thanks for the reply's. should i try and raise the idle a little,maybe clean the idle control valve. when it drops to 480 rpm the idle has a wierd vibration. with 212k miles maybe the injectors are getting dirty. not real worried but this is the last issue with the car.
again thank you both for the replys
rich

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88 300E White, sold 9-04
88 190E Black 2.3 sold
90 300CE White, Grey sold 12-24-04
92 400E White,Grey Sold 5-06
90 300CE 91K Signal Red,Black Sold 2007
1989 300CE Smoke silver,Tan Sold 1-08
1993 300E 3.2 M104 motor
1991 300CE White,Grey
1994 E420 beautiful car,gone to new home
1994 E320 Smoke an Parchment.Beautiful car