The valve adjustment requires SHIMS that come in 19 sizes. ANYONE must have the needed sizes OR they won't be able to adjust the valves!! ALSO the cams must come out if the valves need adjustment.
Most idle speed problems on the 16V engine are from the air flow housing SENSOR! It can also cause starting problems.
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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
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