Possible Causes

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 Mercedes-Benz ML320, 2002 Mercedes-Benz E320, 2002 Mercedes-Benz CLK320, 2001 Mercedes-Benz ML320, and 2001 Mercedes-Benz E320. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Manufacturer does not provide testing procedures for this fault.

Engine may have an increased tendency to knock from poor fuel, combustion chamber coking or engine mechanical damage. Inspect and repair as necessary.