90 300E 4 matic problem ?????

[milhan]

I have a 90 300 e 4 matic with 93,000 miles on it. I have been experiencing this weird vibration from the steering wheel when i make a tight turn at very low speeds. I had it in for an oil change and noticed the CV boots were both ripped and grease was everywhere on the bottom of car. I had both axels completely rebuilt thinking this was the source of the problem. I needed the new boots so i figured i would rebuild them anyway. Still the problem is there. My mechanic said the front end components are fine. This problem only occurs when the car is warm. Only after driving maybe 5 miles or more. First thing in the morning the problem does not exist. My steering pump looks to be fine, not leaking fluid. Could this be the problem? the car looks like it has the original plugs and wires, im not sure. It starts a little rough sometimes, but it runs great. The idle is around 600 after it is warmed up. maybe this is too low? cuz when making a low speed sharp turn it seems like the motor wants to die. In the morining when the car is cold, the idle is around 900, and the problem is not evident??? Any ideas????? if the plugs were bad, could this cause the idle to drop at very low speed turns?