See also:

Reset function
You can reset COMAND to the factory settings. Amongst other things, this will delete all personal data (e.g. station presets, address book entries, entries in the destination memory and in the ...

Problems with the cooling with air dehumidification function
When you press the button, the indicator lamp in the button flashes three times or remains off. You can no longer switch on the cooling with air dehumidification function. Consult a qualifi ...

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. ...