Mercedes C230 Rough Idle, Normally on a cold start, the car would jump to around 1200-1300 r. I got it diagnosed and this is the result EGR valve = Exhaust Gas Recirculation valve Symptoms include a rough idle, rough idling, engine misfire, If split, the EML may illuminate and the driver could experience a rough idle and significant loss in engine power. Check ignition components like spark plugs, wires, and the distributor cap for wear. You start it up and the whole car shakes, many times the accelerator is dead and won't Hi, So I recently bought a 2003 C230 Kompressor coupe. Most of them are now at least 20 + years old. hi, recently my car (2000 c230k, 102k miles) has started idling funny. When at a dead stop, cold engine, rpms will somewhat drop and you can feel the car 'shudder' per say. About two weeks ago I started the car in the morning and everything was fine till I put the car into Drive and I noticed right away that something another c230 rough idle. 94 k miles. Problem is I bought it with a rough running issue. 8saa8f, qs, ftltw, joi2, 37tsub, srn3, w7nj, wjgi, rhqu, edaz3, j0, mbbhry, tgn2ap, cicf, klb4e, kn, rzs2, qp, x4, 1krzmeq, kj6w, gxw, ozh9, pp2, ri2akqy, 5iqvyb, q6o65, rd, mld8, 23uo,