I have a 1991 300E 2.6 W124. It has a problem wherein the motor will rev then back-off, all by itself. This continues for a while then it behaves normally. After a while it starts misbehaving again. It can happen when the engine is cold or hot. Cruise-control really gets confused while it does this automatic accelerating, which makes the car drive jerky. I have taken the car to Worrells, who claim to be the most experienced MB dealer/maintenance in Melbourne (Australia) and they are stumped. They have had the car for a week and don't want to give it back until they can identify and fix the problem. Can anyone please help?

Max,
My wild guess is that your accelator
linkages need lubrication. my car did
the same thing last winter,and my mechanic
just told me to lubricate the linkages.I
use transmission fluid and Voila!everything
went back to normal.

Clauser1

I read just recently that (Consumer reports or some other BS), Mercedes (included the full line-up), I think of the late 80's, where they all had reports of taking off by themselves once put into gear (D or R). Is this true? If so, then it might be common, though I had never heard of it until whatever that was I was reading. I dunno!?

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)

Worrell's said the problem was due to faulty spark-plugs. I have my doubts, but we shall see!