Check

See also:

Program selector button
General notes The program selector button allows you to choose between drive programs with different driving characteristics.  In AMG vehicles, drive program E is called drive program C. ...

Problems with the SmartKey
...

Combination switch
Turn signal 1 High-beam headlamps 2 Turn signal, right 3 High-beam flasher 4 Turn signal, left ■ To indicate briefly: press the combination switch briefly to the pressure point in the d ...