Being a Mercedes Benz enthusiast for more than 30 years I cant belive I didnt know about this site!
Great people and tons of info.for making MB ownership a pleasure.
This is my first post so I would like to say hello to all fellow forum members and the same time ask for your help on my 93 300E 2.8.
Couple of month ago eng(in normal operating temp)started a serious idle flactuation(between 700 to 1200RPM)it does this only when trany is in park or neutural,here is the list of the items have been replaced:
ECT sensor
Idle/cruise actuator($900)
wirring harness ($600)
OVP relay
O2 sensor
Induction system is tripple checked for false air,no lock so far.
Any thoughts in this matter will be highly appreciated.

Best regards Rasoul.