I talked to a mechanic about my cruise control not working, he said it's likely the amplifier. There are a few cars near me that are being parted out, and I'm just wondering which amplifiers will work. I hardly ever use cruise control, so if I can avoid buying a new one, great, and if I buy a used one and it quits too, then so be it, my life will still go on.

Aside from 124 models (I'm assuming all years will work for what I need), what other year/models will fit my 1991 300d? Someone has a 1995 320E, and I'm sure other models will work as well, but which ones?

Not trying to hijack this thread, but that is a very good question. Does anyone have a swap/compatibility list or know of one? While I do not have a W124, I would love to know if amps out of any other vehicles would work in my W123 (83 300D)

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2012 Mercedes ML350 Bluetec 91K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 231K (mine)
1998 Volvo S70 T5 Turbo 196K (kids)
1994 Ford F150 4WD 249K (firewood hauler)
1983 Mercedes 300D 376K (diesel commuter)

This is all I know.

Cruise control amp on gas and diesel cars most likely are not compatible.

Some older model years 190D, 300SDL, 300SD cruise amp are compatible.

Older model 300D seems to be different from others. The best way to find out is to look up the part # of the amp for the cars and see whether they match.

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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.

I am surprised to see a 300E and 300D would use different amps!

According to the Germanstar dot net parts search, your amp (MB part 005 545 0532) was used in all 124's through 1992 and all 560SL's). If you get an amp from something other than a 2.5 Turbo, you'll want to use the coding plug on the amp you currently have.

Whether a DIFFERENT amp would work in your vehicle, I doubt it but am not sure.

Happy hunting! I just got one on Ebay for $20 including shipping that works perfectly.

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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

I don't believe your gas/diesel observation is correct. As a case in point, the used 005 545 0532 that I just picked up came off a gasser but is exactly the right part.

Moreover, it is actually better, if you're going to pull a used amp, to get it from a gasser. Less vibration over its life (this acc. to Peter at GDL).

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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

It seems that some cruise amp for newer MBZ, 199x onwards, are compatible between gas and diesel. The best approach is to check for the part number for a match.

__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.