julian14

Hi guys it looks like when it rain it pour/I have been having some issue with the Keyless door handle which iam going to replace the handle (my self) thanks to MBworld menbers. Well Let me start by saying I was driving last night on the highway doing 95mph on 7th gear when i press the gas pedal(lightly) to speed up it started to misfire or shaking. But at that time press it harder it downshift to 6 and car sped up to triple digits without a problem. So if i press on the gas pedal lightly to speed up it does it but if i press it rough it downshift and does not misfire or shake. by the way the engine was at 2000 rpm before i press the pedal. What the hell is this guys. No engine light either. Is this tranny?

Peter_02AMG

Sound like a bad up stream O2 senors is about to go bad. That how my car was before a O2 sensor die. I got a randon/multiple cylinder misfire CEL though.

newlyAMG

I'd have to agree, probably running way off a good a/f ratio down low/cruising, once you step on it it clears itself out and runs as it should.

How many miles?

julian14

My car has 66k right now. Like I said before it run and idle well no misfire or CEL but i felt that problem the other night. Yesterday i tried to ilicit it again but it did not do it. there is the CEL what should i do wait until the problem manisfest it self and come out in the open? I let you guys knows what the outcome is. Thanks a million guys

newlyAMG

Get the code read, that's the obvious starting point (an obdII scanner will I believe read it AND clear it, so if it comes back you have a problem).