Clearing Diagnostic Trouble Codes
WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2004 Mercedes-Benz CLK55, 2004 Mercedes-Benz CLK500, 2004 Mercedes-Benz CLK320, 2004 Mercedes-Benz C320, and 2004 Mercedes-Benz C32. However, it is still accessible from the selected car via links, so may be relevant.
Disconnecting vehicle battery will not erase codes. Follow scan tool equipment manufacturers instructions to erase fault codes.