sakda_mail

I put OM606.962 from 1998 W210 E300TD into W140.
Now, the car runs great and I want to make the cruise control working. I looked at Star Finder and it said the cruise control switch had 6 wires. Unfortunately, there were 8 wires as in http://i.ebayimg.com/00/s/MTIwMFgxNj...SiNP~/$_35.JPG

I already matched "off", "resume", "acc", and "dec". I still have 2 wires left. I guessed they are about speed limit switch. One wire is brown, it connected to ground. The other one is black-white, I can't guess what it is.

Can anyone who has a 1998-99 W210 E300 TD measure this wire connect to ground or +12 or something when the speed limit switch is on and off, please?

PS. the switch is A2105400845.

Plutoe

I have no idea whether this will help clarify your conundrum---as you know the IFI of the 606 controls the CC. The 210 CC connector has six pins---1(blue)resume;2(yellow)decelerate;3(green)accelera te;4(gray)off;5(black)control contact;6(red) voltage(12volts) from the K40.

I have assumed that you used the IFI control module from the W210---that being the case, your issue may be that the W140 CC connector has more or less pins(I have not been able to determine that(the difference if one) because I have not been able to find the W140 CC wiring diagram.

What is the VIN for the W140??

sakda_mail

You are right for the c/c WITHOUT speed limit switch, there are 6 wires. However, what I guess, some W210 cars have c/c with speed limit switch which has 8 wires and 2 extra wire are brown and black-white.

My W140 has 6 wires and I map these wires to W210 IFI control as you said. I also verified this work by using Xentry read the actual values when I activated acc, dec, off, resume c/c switch.

It looks good from Xentry. Unfortunately, when I drive, the c/c doesn't work. I assume that it might be in speed limit mode. Therefore, I try to switch to c/c mode and my problem is I don't know what 2 extra wire are brown and black-white are.

Who has c/c switch with speed limit, please verify there are 8 wires and relationship of black-white wire to the brown and red when speed limit is engaged and disengages, Thanks a lot.

Plutoe

That is why I asked for the W140 VIN. With that I can find the CC wiring diagram for the car---at least what was the model of 6xx.xxx motor in the W140!!

sakda_mail

My W140 vin# is WDB140028-2a-231917
The engine was taken from WDB210025-2a-754696

Thank you so much.

Plutoe

Well the good news is that I believe that I have solved your problem-----which is that if the VIN's you posted are correct---you have a W140 with a 104.994(gas) and a W210 with a 606.692(diesel)-----the 104 CC is controlled by the EA module(electronic acceleration) and the 606 CC is controlled by the IFI module---problem is that the CC is controlled differently and I don't know how to proceed.

sakda_mail

Yes, my car engine was m104. However, the c/c switchs of these 2 models are similar. I tried to connect w140 c/c switch to IFI and I had 2 wires left. If you have the 8-wire c/c switch, could you find out the circuit inside the switch of those 2 wires (black- white and brown)

Plutoe

Using the MB EWA NET WIS database I could not find a W210 606.xxx CC switch with eight wires-----Suggest you contact a dealer who uses the MB server type WIS and see what they can develop.

sakda_mail

I found the info. There are in WIS wiring WDB202128 or pe07.12-p-2000g.
Thank you so much for your help.

Plutoe

Yep I found it in PE07.12P2000-99j-----that option was called "Speedtronic" in the 605.960!!