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Old 04-19-2008, 04:08 PM   #3 (permalink)
falconsprint
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Date registered: Sep 2005
Vehicle: 1989 560SEL, 1998 CL600
Location: California
Posts: 176
You need to determine what is going on with the oil pressure first. If the engine is running without oil there will be serious damage. Look under the oil fill cap. Is there oil on the camshafts? Change the oil and filter. Don't run the engine more than 10-20 seconds without oil pressure. Its possible that the car has sat so long that the oil is old and has gunked up.

The wheezing sound you hear may be a large vacuum leak. The RPM is going up and down because the emissions/idle control isn't able to adjust the air/fuel mixture.
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