See also:

Restoring the factory settings
Press the and buttons simultaneously for approximately six seconds until the battery check lamp flashes twice. ...

Summer tires
 - Optionally, tires with a maximum speed of over 149 mph (240 km/h) may have "ZR" in the size description depending on the manufacturer (e.g. 245/40 ZR 18). The service specif ...

Reception and transmission volume
Once the mobile phone has been authorized, you can optimize the transmission and reception volume settings. Find information on the optimal setting for your mobile phone on the Internet at ...