I am regularly on the 129 forum and it is such a fountain of information and money saving tips- but as i have an SL320 M112 (95000 miles) engine maybe any of you E320 owners might help-(most of the 129ers are sl500 and sl600)-
Problem-since i own the car (bought at 65,000 miles) about ten seconds from cold I get a constant vibration when stationery. It rarely is even noticeable on the rev counter and the revs are correct as per the engine spec. With aircon on it sometimes worsens. When steering wheel is locked it worsens. Sometimes I get a rhythmic surge. If I tough the gas pedal it disappears. Several well qualified mechanics as they don't know where to start have suggested I live with it. No fault codes come up. Otherwise, the car is wonderful and drives beautifully. It sounds as it should. I just want to get rid of the idle.
Looking at the engine in P- it is rough at around 560rpm gets more rough up to 1000rpm and is completely smooth at 1500rpm and above
Replaced - oil oilfilter air filters spark plugs ht leads three engine mounts cps MAF sensor throttle body and egr valve cleaned no obvious vacum leaks(but i don't know how this was tested-by visual inspection?) Gearbox has been rebuilt and works perfectly. Valve cover gaskets replaced and breather hoses from valve covers. ............i am no mechanic but i did the valve cover gaskets and spark plugs myself and am learning all the time -
ANY IDEAS PLEASE?
Thank you very much -
DARRAGH>
Problem-since i own the car (bought at 65,000 miles) about ten seconds from cold I get a constant vibration when stationery. It rarely is even noticeable on the rev counter and the revs are correct as per the engine spec. With aircon on it sometimes worsens. When steering wheel is locked it worsens. Sometimes I get a rhythmic surge. If I tough the gas pedal it disappears. Several well qualified mechanics as they don't know where to start have suggested I live with it. No fault codes come up. Otherwise, the car is wonderful and drives beautifully. It sounds as it should. I just want to get rid of the idle.
Looking at the engine in P- it is rough at around 560rpm gets more rough up to 1000rpm and is completely smooth at 1500rpm and above
Replaced - oil oilfilter air filters spark plugs ht leads three engine mounts cps MAF sensor throttle body and egr valve cleaned no obvious vacum leaks(but i don't know how this was tested-by visual inspection?) Gearbox has been rebuilt and works perfectly. Valve cover gaskets replaced and breather hoses from valve covers. ............i am no mechanic but i did the valve cover gaskets and spark plugs myself and am learning all the time -
ANY IDEAS PLEASE?
Thank you very much -
DARRAGH>