Mastering Acceleration Eradicating Hesitation in Your 2002 S420

This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other ... ... Mercedes-Benz, CLK500 A209, W209, C209, W203, W204, W211, W210, W220, W221 M112 M113 E class C class CLK Class S Class CL class CLS class ... It could be your crank position sensor is starting to go bad. I would also change out your fuel filter. Sign in to reply. Top 5 Mercedes-Benz Transmission Problems. · Low Transmission Fluid · Transmission wire harness 13-pin (O-ring) connector oil leak/contamination · The valve body ... Most hesitation problems are caused by a bad mass air flow sensor. A bad sensor will give you a code that looks like a vacuum leak. This occurs when the car is fully warmed up, when going from 4th down to 3rd. It has approx. 18k miles, and other than this "quirk", it performs very well. My 1995 E320 with the M104 engine has an occasional hesitation problem upon acceleration. The car has 139,000miles and runs VERY smoothly ... This is normally caused by a dirty butterfly flap in the throttle body which causes a small air leak and confuses the ECU. Its easy to clean.... When it happens, it basically for a second doesn't respond to the accelerator input and then lunges forward jerking-ly. I have found that when ... One of the leading causes for hesitation at throttle up is due to excess carbon build up on and around the throttle plate/assembly. This causes ...