1990 560 SEC(gone but not forgoten) 1988 560SL 1998 E320 4matic wagon
I have a rough idle problem. The book says this control provides for better fuel atomization at idle. I would think it was a bad injector but all my plugs are a nice toasty white.No carbon or oil fouling.I tryed the 9 volt battery to the terminals trick and the valve clicks. What is the air sorce that this pulls from? Are there any filters ?