2002 MB S420 Hesitation Demystified Comprehensive Troubleshooting

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. My 1995 E320 with the M104 engine has an occasional hesitation problem upon acceleration. The car has 139,000miles and runs VERY smoothly ... It could be your crank position sensor is starting to go bad. I would also change out your fuel filter. Sign in to reply. A vehicle that hesitates while accelerating or while driving up a hill may have a weak fuel pump. Throttle position sensor: A throttle position sensor tells the ... I'm experiencing hesiation when accelerating which lasts a few seconds. I replaced the fuel filters and the hesitation improved for months, but ... What is happening with the hesitation is the torque converter is not locking up all the way because it is preparing for a rapid changing of ... 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. 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.... I'm working on a 2002 E320 (210.065) which hesitate once in a while. Symptoms are exactly the same as if the brake pedal was depressed during acceleration ... If it has, and considering the age of the vehicle, fuel filters, pumps, and accumulator play into this issue. Water in the fuel can cause ...