Great step-by-step details. I am in process of troubleshooting an issue where my 95 E420 engine shakes when i first start the car after being parked for 2-3 days. in my case the shaking stops once the engine is warmed up and this problem doesn't happen that often either. This happened twice so far after the car is parked a lengthy time. Just wondering if the FPR, among other things, can be the culprit.
