Also a classic sign of a failing idle air valve, or one of the components in the "failure chain" telling the computer to shut the valve down. Possible culprits are the decel switch or the throttle position switch or the air flow sensor.

If you are not intimately familiar with this problem, best take the car to a good shop because this problem can drive you crazy.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe