Date registered: Sep 2010 Location: Vehicle(s): Posts: 1
560sec Fluctuating Idle? So I bought my first Mercedes a few months ago. The car is an 89' 560sec, and I am trying my best to learn as much as I can about the car. Overall, the car really is in very decent shape, and I have done a couple minor things to whip it back into shape. The issue that I am having a little trouble tracking down, is a varying idle while in park. Mainly, I just haven't had a whole lot of time to check everything out and see what sensors or components effect idle on the car. At any temperature, and only in park, the idle is a little rough, and will idle high and then dip, and repeat endlessly. Any ideas as to what this might be? Thanks.