kingmatt16

1997 E420 123k mi, My asr lights (center and left) have started to come on only when the car is in park sitting, fully warmed up. When the lights come on the idle jumps to 1400-1500 rpm and bounces between the two higher idles (almost sounds like hitting a rev limiter at 1500). It will slam into gear and drive very slow if I try to drive it. A restart clears the problem. It has only happened with the engine idling in park, when fully warmed up. Any ideas? Thanks, Matt