WANTED WTB - Thumb Screw for blower motor panel

[Jlaa]

While poking around the car this weekend, I noticed that my car is missing one of the two thumb screws that hold in the blower motor panel in the engine bay. Does anyone have one to sell, or otherwise have the part number to this?

I'm very close to finding the PN in the EPC, but I just can't get to the right page apparently ---- see below. Thank you! (BTW -- none of captruff's parts cars have these thumb screws)

 

[Jlaa]

Found it! Seems this question stumped even our illustrious JC220 and he stumbled across the same EPC diagram before - http://www.500eboard.com/forums/showthread.php?t=10717

Plastic screw--124 821 00 73

The below from that thread explains why I couldn't find this thumbwheel AT ALL in the EPC!

Plastic screw--124 821 00 73. Price is $5.62 for factory part from OEdiscountparts.com.

Regards,

Peter Weissman

Thanks, Peter!

Seems these are not in the EPC for the E500E, but are used on 6-cyl sedans... but not wagons, coupes, or cabrios. And, they are located in the electrical system... Group 82, subgroup 090 (cable covering / blower motor). Not an intuitive location...

 

[makemann]

Jlaa, have you ordered and installed the thumb screw? I received mine and there's no way it is close to being the correct length.

The one on the left is the new part. It is too long. Are there other sizes of this piece available?

Sent from my iPhone using Tapatalk

 

[Jlaa]

Max!!!!! I received the exact same long bolt that you show at the left. I didnt think of comparing it to any other bolt but i have the same exact problem .... the bolt is too long for me to fit in because all kinds of throttle cable hardware is in the way. I just resigned myself to having to disassemble the throttle cable stuff at some point ... i didnt know the bolt is supposed to be much shorter!

 

[doolar]

Same here, ordered and received the long one. According to the Mercedes spare part department there where no such screw at all for my chassis, but I ordered it anyway based on the part number from here. I'll see if I can rethread it. I use blackened stainless steel bolts with a big washer now, maybe I'll just continue using them. They will outlast the car...

 

[gsxr]

Dumb question: Does anyone know for certain if the E500E uses two thumbscrews, or if it uses 2 different types of fasteners for that plastic cable covering? Also, is it possible the thumbscrew in question comes with the plastic panel itself (i.e., not sold separately)?

Side note - these may differ between pre-facelift and facelift cars, and also may be different for the 400E420.

 

[Jlaa]

Same here, ordered and received the long one. According to the Mercedes spare part department there where no such screw at all for my chassis, but I ordered it anyway based on the part number from here. I'll see if I can rethread it. I use blackened stainless steel bolts with a big washer now, maybe I'll just continue using them. They will outlast the car...

Thanks for the idea dollar. I re-threaded my long plastic flower-bolt -- 8mm x 1.25 -- and then cut it down to size. I also reshaped the tip with a dremel to be more pointy like the OE bolt. I didn't have enough finger strength to re-thread the raised collar portion of the bolt and drive it through the die, so I used a power drill to drive the raised collar portion of the bolt through the die.

Sorry --- I don't know why the pictures are rotated like this. The first picture shows the too-long bolt, and the second picture shows the result of my engineering of the bolt next to the original bolt

 

[mikeym]

Thanks for the idea dollar. I re-threaded my long plastic flower-bolt -- 8mm x 1.25 -- and then cut it down to size. I also reshaped the tip with a dremel to be more pointy like the OE bolt. I didn't have enough finger strength to re-thread the raised collar portion of the bolt and drive it through the die, so I used a power drill to drive the raised collar portion of the bolt through the die.

Sorry --- I don't know why the pictures are rotated like this. The first picture shows the too-long bolt, and the second picture shows the result of my engineering of the bolt next to the original bolt

Just got screwed over this stupid screw by Benz. 5$ and it is the wrong length. Even the EPC shows the longer version of the screw and I can't see any possible way how it could fit.
Looks like I need to the do the same thing as Jlaa and make my own....

 

[Jlaa]

Its easy. Good luck. Just a obervation - every w124 I have sen in the junkyard is missing these flower bolts. Most of the time I see regular hex head zinc plated bolts there instead (incongrous color change next to the black panel)

 

[Klink]

Exactly. I just get the long one then cut and redress it to the required length. A possible number worth trying for a short flower head thumbscrew is
124 990 04 12.

 

[Klink]

IIRC, the one on the driver side V8 is actually a fairly conventional DIN number screw 007985-008188.

 

[gsxr]

IIRC, the one on the drivers side is actually a fairly conventional DIN number screw 007985-008188.

I was wondering about that... from the factory, were driver & passenger side fasteners different? I don't recall ever seeing the plastic thumbwheel on both sides.

 

[Klink]

I'm going to order in some of these possibilities and see what I get these days. Will report...

 

[mikeym]

IIRC, the one on the driver side V8 is actually a fairly conventional DIN number screw 007985-008188.

Crap... $20 list price...What is it made of?

 

[david hendy]

I have these thumb bolts for free. The short ones. I must 20 on hand...

 

[gerryvz]

I have a few flower bolts around as well. I’ve been getting them at the yards starting fairly recently.

 

[500AMM]

I was wondering about that... from the factory, were driver & passenger side fasteners different? I don't recall ever seeing the plastic thumbwheel on both sides.

Dave, both of my cars have this flower head bolt on both sides. (...though one bolt is missing ATM)