Hi I am new to this forum as I have just purchesed my first mercedes and I am having some issues with the car at start up and at idle. the car takes a moment on cold start but starts fine once warmed up but the idle is rough and remains rough at all times.can any one give me some direction I have replaced the.
plugs
wires
caps
and rotor buttons.
thought about idle air control valve but dont want to throw parts at it as we know they are not cheap Thanks Bill