help please!! someone on another site said it could be a fuel pump?
my dad has a 03 mercedes C320. he was driving it around 20 mph and giving it gas, no RPM spike, the engine didn't rev or anything, it just went like it was in neutral. he turned the car off, turned it back on and it was fine. he took me driving last night. while attempting to launch from a dead stop, i put my foot all the way down and same thing happened, no RPM spike, you didn't hear the engine revving at all. turned it off and restarted it, it was fine. the car is a 2003 with only 46k miles on it. nothing has been modified on the car except an exhaust system. what could this be? he is going to have to bring it in to Mercedes service but im sure you all know thats not going to be cheap depending on what it is. what can this be? any help would really be appreciated