Hi,

I have a 2001 E200K Tiptronic Estate with 110,000 miles on the clock.

Recently it has started to lose power / acceleration.

For example, driving along at 50mph if I depress the accelerator pedal further down nothing happens, the revs start to drop as does the speed. It feels alot like depressing the clutch pedal in a manual car. If I press the pedal further the car then accelerates as it should.

It does not happen all the time but seems to be getting more regular. At all other times the car seems fine.

Any help would be much appreciated.

Cheers, James

 

my first guess would be the throttle position sensor, at some point the check engine light will come on. sometimes if you floor the pedal a few times while the issue is occuring you will get a check engine light. Ive replaced many TPS for this condition.
usually the car is ok if just driving slowly to normal, but applying more than half throttle quickly usually the problem will occur.
then cycling the key will usually correct the issue again.