My 300D is idling at just under 900 rpm in park. Seems a little high. Before adjusting I tried to check for specs but have found a couple different numbers. What should the ideal idle speed be in park? In drive with brake applied? Thanks.

 

If the car was sold in the US there should be an Emission Sticker on the driverside on the upper crossmember in front of the Radiator. It has your idle speed, Valve Adjustment specs and timing specs and so on.