G320 M104.996 Manual

[kiato4]

Hi all, I had a pdf of the M104.996 service manual specific to the G320. It was on my external hard drive that crashed and now I am missing it!

It was more like an "intro to service" manual that listed a bunch of the features of this engine and how it differs to a regular M104, so it was meant to be used with a regular M104 service manual. Does anyone have a copy?

I am looking to take apart my engine to install a C36 crank, so to get specific info on the M104.996 would be a world of help. I am happy to buy a hard copy if anyone has one.

 

[Acharris92]

Did you ever get a copy?

 

[The G320 Driver]

Hi guys, I do have some manuals for G320 m104.996 as well as for the G 300td G500 and some electrical drawings as pdf.
I do have also a question, do you have any ecu for the m104.996 engine in us. I’m in Germany and this engine was not build for EU. ONLY US JAPAN.

 

[Falkon]

Hi guys, I do have some manuals for G320 m104.996 as well as for the G 300td G500 and some electrical drawings as pdf.
I do have also a question, do you have any ecu for the m104.996 engine in us. I’m in Germany and this engine was not build for EU. ONLY US JAPAN.

Do you mind sharing the Manuals and Wiring Diagrams for the g320 104.996 Engine series please? I have a 1996 G320 that has that engine series and I have been searching for any documentation on it.

 

[The G320 Driver]

Do you mind sharing the Manuals and Wiring Diagrams for the g320 104.996 Engine series please? I have a 1996 G320 that has that engine series and I have been searching for any documentation on it.

Good morning Falcon,
I just send you some information peer PN please go through the files and see if it’s helpful for you and let me know. We are the last inline 6 owner of the m104 engines I think this ecu is a Transition Solution to the v6 Engines with immobilizer.
cheers.

 

[Falkon]

Good morning Falcon,
I just send you some information peer PN please go through the files and see if it’s helpful for you and let me know. We are the last inline 6 owner of the m104 engines I think this ecu is a Transition Solution to the v6 Engines with immobilizer.
cheers.

Hello,

Thanks so much for the information, I will truly spend quality time reading through the documents and shall keep you posted. It's so frustrating dealing with these peculiar issues that doesn't seem to be widespread.

My Electrical Tech was even suggesting that I should downgrade the Wiring Harness, ETA with its separate module, ECU and any other bits to the earlier M104 variant found in the early model E320.

This is essentially converting the Engine management system and wiring harness to an earlier model E320. I'm not fully sold on this idea yet but, I am giving it a thought if every other G320 solutions fail.

 

[The G320 Driver]

Hey Falcon,
May you try to find a 320 Sedan ecu with immo N57 module and the right key to the setup.
What I am looking for is the mention setup above also, I just send some requests to the sedan ecu sellers if it’s available such that.
Hope to find one setup to try out, if not I will by a running 320 sedan to ripping out my needs.

 

[Landscraper]

I would love a copy of the manuals @The G320 Driver. The only version I have is in German which is not very convenient

 

[Falkon]

Hey Falcon,
May you try to find a 320 Sedan ecu with immo N57 module and the right key to the setup.
What I am looking for is the mention setup above also, I just send some requests to the sedan ecu sellers if it’s available such that.
Hope to find one setup to try out, if not I will by a running 320 sedan to ripping out my needs.

This is an expensive option but we may not have any other choice.

My G320 ETA (Electronic Throttle Actuator) does not have the long Wire Pigtail, the connector is right on the ETA itself and it does not have a separate Module for the ETA unlike my earlier 1995 W124 E320.

My questions are:
1. Do other earlier model G320's also not have a separate module for the ETA?
2. Do you know if the pinouts on the 1996 G320 ECU VDO 0195450632 is exactly the same as the the 018545...... ECU from the Sedans and what happens to their ETA Module?

 

[The G320 Driver]

Please read my other posts regarding this issue here.

Thread 'ECU for M104.996 engine in G320'

Jun 11, 2025

Hello gerryvz,
I’m new here on board and had already lot of tips seen here for my G. I do have the same G-wagon like you. But I do have a big problem with the ecu. I’m searching a ECU for M104.996 engine which is not available in Germany because this G320 with the m104.996 engine is made for US/japan.
Is there any possibility to get it in US,
The serial Nr is VDO 019 545 02 32 [08]
Thank you.

• The G320 Driver
• Replies: 54
• Forum: G-Wagen Models

• 

I had a long correspondence with Gerry about this.
Unless I'm mistaken, he has an M104.996 engine (Sorry here, not .995) where the lock is not connected or communicates with the ECU. This is why he was able to run with the E320 ECU. Incidentally, the E's are also equipped with the xxx.995 engines. Gerry recommended this to me without knowing that I have the .996 engine and that is also the reason why I'm trying to combine these ECUs for the .996 engine ECUs. At least to swap the identical parts so that in the end there is a working solution. So far I've found two ECUs where the circuit boards are identical apart from a few part numbers. I already mentioned this and posted pictures. Now I'm going to sacrifice this and try to get the whole thing working. You have to remember, it's a hobby and you have to have time for it.

 

[gerryvz]

My engine is a 104.996. That is the only variant of the engine that was made for the W463 chassis.

The W124 version as used in the US-market E320 is the 104.992. None of the W124 M104s used IRCL, DAS or any other security setup with the ECU hard-coded to the chassis. The W210, which debuted for the 1996 model year in the US, used early-generation IRCL, DAS and had security hard-coded into it.

 

[The G320 Driver]

My engine is a 104.996. That is the only variant of the engine that was made for the W463 chassis.

The W124 version as used in the US-market E320 is the 104.992. None of the W124 M104s used IRCL, DAS or any other security setup with the ECU hard-coded to the chassis. The W210, which debuted for the 1996 model year in the US, used early-generation IRCL, DAS and had security hard-coded into it.

Thanks for correcting my bad Gerry.

 

[Falkon]

My engine is a 104.996. That is the only variant of the engine that was made for the W463 chassis.

The W124 version as used in the US-market E320 is the 104.992. None of the W124 M104s used IRCL, DAS or any other security setup with the ECU hard-coded to the chassis. The W210, which debuted for the 1996 model year in the US, used early-generation IRCL, DAS and had security hard-coded into it.

Hi Gerry,

Could you assist point me to where the ETA Module is on this G320, if indeed it has any, please.

I know the sedans have it but I haven't seen any on my 1996 G320.

Best Regards.

 

[gsxr]

The module which controls the ETA is known as:

T/LLR module, for models without ASR
E-GAS module, for models with ASR

This should apply to the M104 with HFM engine management. Throttle control integrated into the main ECU (along with fuel & ignition) started with ME 1.0 engine management.

 

[Falkon]

The module which controls the ETA is known as:

T/LLR module, for models without ASR
E-GAS module, for models with ASR

This should apply to the M104 with HFM engine management. Throttle control integrated into the main ECU (along with fuel & ignition) started with ME 1.0 engine management.

Thanks GSXR.

So in essence, I should not expect to see any of those Modules on the vehicle. Please correct me if I am mistaken.

My vehicle is the 1996 G320 with M104.996 Engine and VDO ECU 0195450632[08].

Warm Regards

 

[gsxr]

Thanks GSXR.

So in essence, I should not expect to see any of those Modules on the vehicle. Please correct me if I am mistaken.

My vehicle is the 1996 G320 with M104.996 Engine and VDO ECU 0195450632[08].

I do not know. You need to figure out if your engine has HFM or ME 1.0 engine management.

HFM will have 3 ignition coils.

ME 1.0 will have 6 ignition coils.

From what I can see in the EPC, it looks like 3 coils... and likely HFM.

 

[Falkon]

I do not know. You need to figure out if your engine has HFM or ME 1.0 engine management.

HFM will have 3 ignition coils.

ME 1.0 will have 6 ignition coils.

From what I can see in the EPC, it looks like 3 coils... and likely HFM.

Thanks GSXR.

My Engine (M104.996) has the HFM (Hot Film air Mass measurement) system with 3 Coil packs. This is similar to my earlier 1995 W124 (with M104.992 engine) which had the separate ETA Module.

Hence my confusion since not being able to locate a similar module on the G.


Is there an M104.99xxx Engine that use the ME 1.0 with 6 ignition coils?

 

[gsxr]

Thanks GSXR. My Engine (M104.996) has the HFM (Hot Film air Mass measurement) system with 3 Coil packs. This is similar to my earlier 1995 W124 (with M104.992 engine) which had the separate ETA Module.

Hence my confusion since not being able to locate a similar module on the G.

Maybe someone else can describe where the E-GAS (or T/LLR) is located on their G-wagen?

Is there an M104.99xxx Engine that use the ME 1.0 with 6 ignition coils?

I don't think so... I can't recall any M104 that ever had ME 1.0 engine management, but the G-wags are unusual rigs, so I wasn't sure!

 

[Falkon]

Thanks. I wanted to make sure that I wasn't missing anything.

It's been a nightmare trying to self-diagnose the vehicle issues.

 

[gerryvz]

There was no ASR used on the W463 chassis. It would be 100% incompatible with the full-time four-wheel-drive nature of the vehicle. Separately, though, it is possible to switch OFF the ABS capability, using a dashboard switch. A "yellow triangle" in the middle of the speedometer gauge lights up when ABS is de-activated manually, and looks identical to the "yellow triangle" in the middle of the E500E speedo, indicating that ASR has been activated (or is faulty).

For the G320, the location of the ETA ifself, is on the driver's side of the engine block/head, under the intake system. The "crossover" black pipe across the valve cover goes down INTO the ETA.

Here is a photograph of the ETA, removed from the intake manifold on the G320, but generally in the place where it resides:


The G-wagen, as far as I know, only has a few computers.

I am not aware of the G320 having an E-GAS or T/LLR module -- those are specific to the LH injection systems. Looking through the official MB electrical wiring diagrams and component listings for the G320 confirms this. My experience with the M104.992 in the W124, also confirms that there is no E-GAS or T/LLR module for the [GVZ EDIT: non-ASR] E320 models -- this functionality is controlled via the HFM computer, which integrates fuel, ignition and intake control functionality.

For the W463/G320:

The ECU (HFM computer), an ABS computer, and a cruise control computer are the primary computers. Also an airbag sensor/control module, and an IRCL control module for the DAS system.

• The HFM computer is located behind/below the glove box on the passenger side.
• There is also a cruise control computer located behind/below the glove box on the passenger side.
• The ABS computer is located behind/below the glove box on the passenger side.
• The infrared remote (IRCL/DAS) control module is located in the glove box area.

I hope this helps.
Cheers,
Gerry

 

[gerryvz]

The module which controls the ETA is known as:

T/LLR module, for models without ASR
E-GAS module, for models with ASR

This should apply to the M104 with HFM engine management. Throttle control integrated into the main ECU (along with fuel & ignition) started with ME 1.0 engine management.

Actually, HFM **is** a variant of / closely related to / based on ME 1.0 (Bosch Motronic) engine management. Technical information from MB and other sources will confirm this fact, that the HFM-based M104 engines, used a Motronic system variant, that integrates fuel, ignition, engine management and diagnostic capabilities in a single, integrated control unit ("computer" or "Steuergerat" auf Deutsch).

From a naming perspective, HFM is a Mercedes-Benz-specific (air mass measuring) component, whereas Motronic is considered more of an overall "system."

There is no separate computer/module in [GVZ EDIT: non-ASR] Mercedes-Benz HFM systems, for controlling the ETA, like the LH systems have (i.e. E-GAS or T/LLR).

Cheers,
Gerry

 

[gsxr]

There was no ASR used on the W463 chassis. It would be 100% incompatible with the full-time four-wheel-drive nature of the vehicle. Separately, though, it is possible to switch OFF the ABS capability, using a dashboard switch. A "yellow triangle" in the middle of the speedometer gauge lights up when ABS is de-activated manually, and looks identical to the "yellow triangle" in the middle of the E500E speedo, indicating that ASR has been activated (or is faulty).

Ah, interesting - I didn't know ASR wasn't a thing on the G's.

I am not aware of the G320 having an E-GAS or T/LLR module -- those are specific to the LH injection systems. Looking through the official MB electrical wiring diagrams and component listings for the G320 confirms this. My experience with the M104.992 in the W124, also confirms that there is no E-GAS or T/LLR module for the E320 models -- this functionality is controlled via the HFM computer, which integrates fuel, ignition and intake control functionality.

E-GAS is definitely used on both LH and HFM systems. The 124 chassis with M104, HFM, and ASR have E-GAS module controlling the ETA. EPC screenshot below for the 124.092 & 104.992.

What I'm not sure about is if there's a T/LLR module used with HFM. The function of the T/LLR is for idle speed control (ISC) and cruise control (CC), and sometimes it is referred to as "ISC/CC" in factory documents.

If T/LLR doesn't exist with HFM, and G-wagens do not have ASR, that would explain the missing module!

 

[gerryvz]

Hence my confusion since not being able to locate a similar module on the G.


Is there an M104.99xxx Engine that use the ME 1.0 with 6 ignition coils?

You can't locate a similar module on the G, because it doesn't exist.

No M104.99x engine exists that DOES NOT use the HFM (based on Bosch Motronic, but MB-specific variant). There are other versions of the M104 (.97x, .98x) that use the Bosch LH and Bosch KE injection systems.

 

[gerryvz]

Ah, interesting - I didn't know ASR wasn't a thing on the G's.



E-GAS is definitely used on both LH and HFM systems. The 124 chassis with M104, HFM, and ASR have E-GAS module controlling the ETA. EPC screenshot below for the 124.092 & 104.992.

What I'm not sure about is if there's a T/LLR module used with HFM. The function of the T/LLR is for idle speed control (ISC) and cruise control (CC), and sometimes it is referred to as "ISC/CC" in factory documents.

If T/LLR doesn't exist with HFM, and G-wagens do not have ASR, that would explain the missing module!




View attachment 220594 View attachment 220595

As I said, there is 100% NOT a separate ETA control module used with the G320 / M104.996.

There is no T/LLR (ETA) control module used with any version of HFM.

I have owned one 104.992 WITH ASR, and one without. And yes, now that you reminded me, there WAS an E-GAS module with the ASR car. Definitely no ETA control module with the non-ASR car, nor the G-wagen.

The G320 has a separate cruise-control module / Steuergerat, as I indicated above. However, it DOES NOT control idle, and is only a singular-function module for CC.

 

[Falkon]

There was no ASR used on the W463 chassis. It would be 100% incompatible with the full-time four-wheel-drive nature of the vehicle. Separately, though, it is possible to switch OFF the ABS capability, using a dashboard switch. A "yellow triangle" in the middle of the speedometer gauge lights up when ABS is de-activated manually, and looks identical to the "yellow triangle" in the middle of the E500E speedo, indicating that ASR has been activated (or is faulty).

For the G320, the location of the ETA ifself, is on the driver's side of the engine block/head, under the intake system. The "crossover" black pipe across the valve cover goes down INTO the ETA.

Here is a photograph of the ETA, removed from the intake manifold on the G320, but generally in the place where it resides:
View attachment 220593

The G-wagen, as far as I know, only has a few computers.

I am not aware of the G320 having an E-GAS or T/LLR module -- those are specific to the LH injection systems. Looking through the official MB electrical wiring diagrams and component listings for the G320 confirms this. My experience with the M104.992 in the W124, also confirms that there is no E-GAS or T/LLR module for the [GVZ EDIT: non-ASR] E320 models -- this functionality is controlled via the HFM computer, which integrates fuel, ignition and intake control functionality.

For the W463/G320:

The ECU (HFM computer), an ABS computer, and a cruise control computer are the primary computers. Also an airbag sensor/control module, and an IRCL control module for the DAS system.

• The HFM computer is located behind/below the glove box on the passenger side.
• There is also a cruise control computer located behind/below the glove box on the passenger side.
• The ABS computer is located behind/below the glove box on the passenger side.
• The infrared remote (IRCL/DAS) control module is located in the glove box area.

I hope this helps.
Cheers,
Gerry

Hello Gerry,

A million thanks to you for taking the time to provide this detailed clarifications.

I saw something very interesting in the Engine picture you posted; your ETA closely resembles the one I had on the 1995 W124 with ASR and its control module. I see it has the pigtail harness while the one on my 1996 G320 does not; its connector is right on the ETA itself. So would it be safe to say that they could be interchangeable?



I ask these questions to get a better feel for my alternative option to solving the scarce VDO ECU 0195450632 problem that I have, and probably following your path with using the more common ECUs from the E320s.

I know that I will still have to figure out a way to re-jig the Harness so it doesn't hang up on the DAS system in my vehicle presently.

Any ideas would be well appreciated.

 

[Falkon]

Ah, interesting - I didn't know ASR wasn't a thing on the G's.



E-GAS is definitely used on both LH and HFM systems. The 124 chassis with M104, HFM, and ASR have E-GAS module controlling the ETA. EPC screenshot below for the 124.092 & 104.992.

What I'm not sure about is if there's a T/LLR module used with HFM. The function of the T/LLR is for idle speed control (ISC) and cruise control (CC), and sometimes it is referred to as "ISC/CC" in factory documents.

If T/LLR doesn't exist with HFM, and G-wagens do not have ASR, that would explain the missing module!




View attachment 220594 View attachment 220595

Hey GSXR,

You are correct, my 1995 W124 had that extra Module that controlled the ETA.

 

[Falkon]

As I said, there is 100% NOT a separate ETA control module used with the G320 / M104.996.

There is no T/LLR (ETA) control module used with any version of HFM.

I have owned one 104.992 WITH ASR, and one without. And yes, now that you reminded me, there WAS an E-GAS module with the ASR car. Definitely no ETA control module with the non-ASR car, nor the G-wagen.

The G320 has a separate cruise-control module / Steuergerat, as I indicated above. However, it DOES NOT control idle, and is only a singular-function module for CC.

You have just nailed it Gerry.

Thanks a lot.

 

[Falkon]

You can't locate a similar module on the G, because it doesn't exist.

No M104.99x engine exists that DOES NOT use the HFM (based on Bosch Motronic, but MB-specific variant). There are other versions of the M104 (.97x, .98x) that use the Bosch LH and Bosch KE injection systems.

Thanks a million.

I had issues plugging on the BOSCH ECU in my G320, I tried with at least 3 different ECUS and each time I plugged one in, the #10 Fuse gets blown and there won't be any life in the Instrument Cluster nor Ignition Key.

It made me to start wondering if the Wire Harness for VDO ECUs are different from the BOSCH ECUs.

You may notice that there are missing Pins on the VDO ECUs while the BOSCH ECUs have a full rack of Pins. Any thoughts on this please?

 

[The G320 Driver]

you Can’t use the Bosch that’s fact.
you need the same one like in side ( Siemens VDO). I did the same thing with the e320 ECU all numbers were matching on the board only problem is the DAS.
My ECU returns just an hour ago and see there it works perfect.

 

[gsxr]

I saw something very interesting in the Engine picture you posted; your ETA closely resembles the one I had on the 1995 W124 with ASR and its control module. I see it has the pigtail harness while the one on my 1996 G320 does not; its connector is right on the ETA itself. So would it be safe to say that they could be interchangeable?

View attachment 220676 View attachment 220678

Those ETA's have multiple physical differences besides the connector location.

I would assume they ARE NOT interchangeable.

 

[gerryvz]

Hello Gerry,

A million thanks to you for taking the time to provide this detailed clarifications.

I saw something very interesting in the Engine picture you posted; your ETA closely resembles the one I had on the 1995 W124 with ASR and its control module. I see it has the pigtail harness while the one on my 1996 G320 does not; its connector is right on the ETA itself. So would it be safe to say that they could be interchangeable?

View attachment 220676 View attachment 220678

I ask these questions to get a better feel for my alternative option to solving the scarce VDO ECU 0195450632 problem that I have, and probably following your path with using the more common ECUs from the E320s.

I know that I will still have to figure out a way to re-jig the Harness so it doesn't hang up on the DAS system in my vehicle presently.

Any ideas would be well appreciated.

The ETA used in my 1995 G-wagen is the identical part as used on the M104.992 engines on the US-spec E320 models (non-ASR). The green stripe on the ETA label also indicates that it is a non-ASR ETA -- if it was an ASR ETA, the label would be all white with black letters/numbers (such as on the E500E). The "pigtail" connector is also the "later" design - not the pancake design of the ETAs used through the early/mid ~1993 model year on ETAs for LH engines.

I actually have a spare ETA or two that I got from non-ASR E320 cars from wrecking yards over the years (post-1998 date code on them, for good internal/external wiring). They have the SAME part number on them as my G320's ETA.

Your ETA I do not believe would at all be compatible with the ETA that my engine uses. I am sure the MB EPC/ISPPI would show the difference in these ETAs based on your VIN number vs. my VIN number.

Your ETA almost looks like a KE-Jetronic (earlier than HFM) ETA in design -- very similar to the one used on my 1989 560SEC.

 

[Falkon]

you Can’t use the Bosch that’s fact.
you need the same one like in side ( Siemens VDO). I did the same thing with the e320 ECU all numbers were matching on the board only problem is the DAS.
My ECU returns just an hour ago and see there it works perfect.

Okay thanks, that makes a lot of sense. I'll stick with the Siemens VDO version.

 

[Falkon]

The ETA used in my 1995 G-wagen is the identical part as used on the M104.992 engines on the US-spec E320 models (non-ASR). The green stripe on the ETA label also indicates that it is a non-ASR ETA -- if it was an ASR ETA, the label would be all white with black letters/numbers (such as on the E500E). The "pigtail" connector is also the "later" design - not the pancake design of the ETAs used through the early/mid ~1993 model year on ETAs for LH engines.

I actually have a spare ETA or two that I got from non-ASR E320 cars from wrecking yards over the years (post-1998 date code on them, for good internal/external wiring). They have the SAME part number on them as my G320's ETA.

Your ETA I do not believe would at all be compatible with the ETA that my engine uses. I am sure the MB EPC/ISPPI would show the difference in these ETAs based on your VIN number vs. my VIN number.

Your ETA almost looks like a KE-Jetronic (earlier than HFM) ETA in design -- very similar to the one used on my 1989 560SEC.

Hi Gerry,

Please see my VIN: WDB46323117105387 to assist me look and pull up the correct Modules that came originally with my Vehicle.

Below is a snapshot of what I could pull up from LastVin.com

 

[Falkon]

Those ETA's have multiple physical differences besides the connector location.

I would assume they ARE NOT interchangeable.

Thanks for that guidance, @gsxr .

 

[PierreC]

Hi, my G36 from 1997 also based on a M104.996 , can you share me the manual by MP ? Please