Easiest answer is follow the proceedure in the owner's manual.
To set the clock in a 2001 Mercedes-Benz CLK 430, turn on the ignition without starting the engine. Press the "Clock" button on the dashboard to activate the clock setting mode, then use the "+" and "–" buttons to adjust the hours and minutes. Once the correct time is displayed, press the "Clock" button again to save the settings.
First, adjust the hours. Then, adjust the minutes
The 2001 Mercedes-Benz C-Class has 24 valves.
The 2001 Mercedes-Benz M-Class has 18 valves.
The 2001 Mercedes-Benz SLK-Class has 16 valves.
The 2001 Mercedes-Benz SL-Class has 24 valves.
The 2001 Mercedes-Benz E-Class has 18 valves.
The 2001 Mercedes-Benz SL-Class has a V8 engine.
The 2001 Mercedes-Benz CL-Class has 24 valves.
The 2001 Mercedes-Benz M-Class has a V6 engine.
The 2001 Mercedes-Benz CL-Class has a V8 engine.
The 2001 Mercedes-Benz S-Class has 24 valves.