What is the location of an idle control valve on a 1990 Mercedes 560 SEL?

The idle control valve on a 1990 Mercedes 560 SEL is typically located on the intake manifold, near the throttle body. It is usually positioned on the driver's side of the engine, connected to the air intake system. The valve helps regulate the engine's idle speed by controlling the amount of air bypassing the throttle plate. If you're looking for it, it may be helpful to refer to the vehicle's service manual for a precise diagram.