See also:

Activating/deactivating the MONOfunction
The MONO function is only available with automatic climate control.18 You can use the MONO function to adopt the settings configured for temperature, air distribution and airflow on the driver's s ...

Additives
Do not use any additives in the engine oil. This could damage the engine. ...

Please bear the following in mind
At the onset of winter, have your vehicle winterproofed at a qualified specialist workshop, e.g. at an authorized Mercedes- Benz Center. Observe the notes in the "Changing a wheel" sectio ...