Help please! 1996 E230 Cruise Control Drop Out
 

Hi. Our 1996 E230 has recently developed a cruise control problem.
It drops out after about 1-2 kms at any set speed (without touching the brake etc). Want to DIY fix if possible. Local mechanic had a look at the break pedal and said that there are cables disappearing into the dash from the brake pedal arm and said he doesn't understand how it works ie cc break operation/switch. Have read many of the threads.
Have checked the bulbs and the brake lights etc - seems all ok. Have recently replaced the rear tyres to the correct size, the front are slightly smaller in diameter - would this affect the cc operation?
Is there anything else that I can do?
Thanks. Ed.

Did the problem start when you replaced the rear tires? I know on some cars uneven tire diameters can cause this problem. But I don't know the specifics about it or that car. I think the tire size problem only occurs above a certain speed, not at "any speed."

You are correct, Mpolli. It only takes a small difference in rolling diameter to knock out the CC.

If it's not the tire diameters, you could have a dirty ABS wheel sensor.

It possibly did start after replacing the rear tyres. Will replace front two to match the back two this week and hopefully problem solved. How do I check the ABS sensor?
Thank you for your help.

Have replaced the 2 front tyres and Problem Solved!!!! Thank you for the advice.
This is a great forum. Thank you Peach Parts.