![]() In the morning when I start the vehicle up, the idle surges about 500-600 RPM above idle for about 45sec-1min and then finally goes away. I have a 2000 Mercedes C230 Kompressor with the codes P1525 and P0170. p2023 ROUGH IDLE RATTLING NOISE IN ENGINE AREA, HARSH SHIFTING, NO THROTTLE RESPONSE, HESITATES WHEN ACCELERATING WITH A CLICKING SOUND. Ive got a 2006 203 C230 with the 112 engine. Hi, I have a 2004 Mercedes C230 Kompressor jas codes p200b b61. They dont wear out often and need to be of the Quality commensurate with the engineering in that Engine…which is to say…High Quality. 06 W203 C230 Rough Idle on cold startup, help please Im an up-and-coming MB technician who is trying to get my homework in. Replacing the plugs probably wont hurt you either…when were they last replaced? Use the OEM plug as well…almost surely some form of Bosch Platinum…or other high quality plug…Do not skimp on the type of Spark Plug. If NO codes…you need to see if you have anything in the plug well that would short the coil to ground. If you do have an engine code…it will point to the offending plug/coil combo…after that…just replace whatever one is misfiring. Id check for codes and if there are none…pull a few coils and make sure there is no oil in the plug well…or any other liquid. Upon acceleration (with my hood up and manually accelerating the engine) I can here a grinding/rattling noise coming from the passenger side of the engine bay. If one of the coils is failing…you should throw a code, but I have seen many engines NOT throw a code when one of the coils shorts to ground (usually from oil in the plug well from a leaking valve cover gasket) When they short to ground you dont get a code bec technically the coil is firing but that energy is going to ground instead of thru the plug. Hi I have had my Kompressor for about 3 months now and love it. I believe your engine has coil over plug system…which means No distributor, no spark plug wires…Just coils…over plugs. I would replace the spark plugs and the offending coil. Sounds like one of your ignition coils is beginning to die.
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