I collect many types of cars, but this is my first Mercedes. The car is a 1987 300e with 188,000 mile onboard. I have just rebuilt the head i.e. “do to blown head gasket”, and am wondering how the car should feel at idle. I have a Porsche 928 and if you didn’t look at the tack, you wouldn’t know if the car was running or not. The 300e runs smooth, but I can feel the car through the driver seat when idling. Is this normal? And while I’m on the topic of seats, are all 300e seat so uncomfortable? These are by far the worst seats I have ever come across When I go around a corner the seat feels as though it’s loose and moves around but it’s not loose just seem very cheaply made.