I have a W140 S350TD. My cruise control do not function properly, and my ABS and ASD do not function at all. I have heard that one or several fuses may have to be replaced, but I have checked the two fuse boxes in the engine compartment and the trunk. Are there more boxes to check?



sry spelling mistakes

 

make sure tire sizes are the same, on your car ive seen wheel speed sensors go bad and that can cause that. What do you mean cruise control doesnt function properly? does it work?

 

It works, but after a few seconds (5-10) it shuts down, and I have to enable it again. If I in/decrease speed contionuisly it works as long as I do that.

 

Anyone got a clue what may be my problem?

I got a tip the other day that it may be the vacuum-pump that may be overloaded because it's getting old or something...?

 

Yeah, I talked to my Mercedes-dealer here, and they said it could be the speed sensor. Are there one on each tire, and is there any way to find out if it's the speed sensor(s) that's broken?

Edit: Those speed sensors are also used to control the ASD and cruise control?

 

yes the dealer will hook the machine and look at the actual values of each wheel, and see if they read the speed of the wheels turning. it can affect cruise control but also even with no cruise control to. so if you car drives normal except for in cruise control then it might not be your rpm sensor for the wheels. maybe a bad CC switch. could be other things too.

 

It drives normally, but the ABS and diff does not work.

Edit: :-(