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Different versions of EZL / Testing EZL functions
- Thread starter 195910
- Start date
Best I can tell there were minor software revisions with each of the 4 (Siemens) part numbers of 5.0L EZL, and the last number (015-545-61-32) had an early and late software revision with the same part number, varies by date code... later ones have the latest software.
Factory docs mentioned very little about updates, the info I've seen is quite vague. No particular part number seems to make more power than the others, at least not that I've been able to determine. All the 5.0L units are interchangeable across all years/models, for both 5.0L and 6.0L engines.
Factory docs mentioned very little about updates, the info I've seen is quite vague. No particular part number seems to make more power than the others, at least not that I've been able to determine. All the 5.0L units are interchangeable across all years/models, for both 5.0L and 6.0L engines.
Thanks Dave,
I thought what would be the benefits of running the newest EZL part number vs older units.
The R129 LH and W124 have the same part numbers, but some EZL numbers are W140 specific with the superseding number being common with the R129/W124
And yes the Factory E60 EZL is the same as the common 5L M119LH. I confirmed the numbers with a 1995 E60 and a late 1994 E60 LTD
I thought what would be the benefits of running the newest EZL part number vs older units.
The R129 LH and W124 have the same part numbers, but some EZL numbers are W140 specific with the superseding number being common with the R129/W124
And yes the Factory E60 EZL is the same as the common 5L M119LH. I confirmed the numbers with a 1995 E60 and a late 1994 E60 LTD
All the 124, 129, and 140 5.0L EZL's are the same part numbers, same interchange. There are a couple of different ones for very early production (1990-1991) used with different coils, according to EPC footnotes. None are 140-specific that I know of.
There was an AMG-specific EZL for the E60 with HWA- part number but it is extremely rare, and nobody knows exactly what is different about it. If it was Bosch-only, it's possible many were already replaced with Siemens 5.0L versions, as all the Bosch EZL's are known to be failure-prone and have shorter lifespans than Siemens.
AFIAK, the main benefit of a late-datecode EZL is that it should have less hours of use, and may last longer than one from the early 90's. I've never seen an EZL with a production date newer than 2004.
There was an AMG-specific EZL for the E60 with HWA- part number but it is extremely rare, and nobody knows exactly what is different about it. If it was Bosch-only, it's possible many were already replaced with Siemens 5.0L versions, as all the Bosch EZL's are known to be failure-prone and have shorter lifespans than Siemens.
AFIAK, the main benefit of a late-datecode EZL is that it should have less hours of use, and may last longer than one from the early 90's. I've never seen an EZL with a production date newer than 2004.
I know that this is not strictly on topic in a V8 discussion but my 300-24 lists these EZLs:
Original for car: A0105459532 (Bosch 0027400736) or A0105459632 (Siemens: 5WK6 K30571HR1)
Replacement: A0125452032 (Bosch 0227400738) or: A0125452132 (Siemens EZ0051 5WK6 K30575HR1)
All these have been fitted with the #2 trimming plug: Kat with 0 degrees retard. My car is a Euro spec with Kat - brand new Kat now!
I have driven with all the above EZLs with the exception of the recently purchased (1100€ from MB Bochum) A0105459532 (Bosch 0027400736).
I have noticed ZERO difference in performance or fuel consumption.
That doesn't really contribute very much to the discussion, does it?
Best to all.
RayH
Original for car: A0105459532 (Bosch 0027400736) or A0105459632 (Siemens: 5WK6 K30571HR1)
Replacement: A0125452032 (Bosch 0227400738) or: A0125452132 (Siemens EZ0051 5WK6 K30575HR1)
All these have been fitted with the #2 trimming plug: Kat with 0 degrees retard. My car is a Euro spec with Kat - brand new Kat now!
I have driven with all the above EZLs with the exception of the recently purchased (1100€ from MB Bochum) A0105459532 (Bosch 0027400736).
I have noticed ZERO difference in performance or fuel consumption.
That doesn't really contribute very much to the discussion, does it?
Best to all.
RayH
I believe that all EZLs for a given engine, with a different part number, have different programming, and/or manufacturers.
That's not to say that they won't perform identically in real-world driving. But, MB would not assign different part numbers to EZLs unless there were substantive differences in them.
That's not to say that they won't perform identically in real-world driving. But, MB would not assign different part numbers to EZLs unless there were substantive differences in them.
My guess is that the other ones for a 300-24 are for regions with different or onerous emissions regulations. California, etc?
R
Could be for different markets, or emissions regulations, or could be for different models/sub-types of the engine, or for different models. You can see all of the different EZLs for the E500E listed in the Wiki, and yes, some are market and application-dependent, although over the years MB largely superseded the EZLs and LH units down into a single part that is applicable for all models (129, 124, 140) of a given displacement and engine type.
