See also:

Replacing the windshield wiper blades
Removing the wiper blades Remove the SmartKey from the ignition lock or turn it to position 0 (KEYLESS-GO). Fold the wiper arm away from the windshield until it engages. Set the wiper blade ...

SmartKey
0. To remove the SmartKey (shift the transmission to position P) 1. Power supply for some consumers, such as the windshield wipers 2. Ignition (power supply for all consumers) and driv ...

Roadside Assistance button
  Press and hold Roadside Assistance button 1 for more than two seconds. This initiates a call to the Mercedes-Benz Customer Assistance Center. The indicator lamp in Roadside Assistance but ...