See also:

Folding the exterior mirrors in or out electrically
This function is only available in vehicles for Canada. Make sure that the SmartKey is in position 1 or 2 in the ignition lock. Briefly press button 1. Both exterior mirrors fold in or out ...

Cleaning the steering wheel and gear or selector lever
  Thoroughly wipe with a damp cloth or use leather care agents that have been recommended and approved by Mercedes- Benz. ...

Important notes on the use of KEYLESSGO
- The KEYLESS-GO key can be used like a conventional key. - You can combine KEYLESS-GO functions with those of a conventional key, e.g. unlock with KEYLESS-GO and lock with the & button. ...