See also:

High outside temperatures
If DEF heats up to over 122 °F (50 °C) for extended periods, e.g. as a result of direct sunlight on the DEF reservoir, DEF can decompose. Ammonia vapors develop as a result. WARNING When o ...

Active safety: New assistance for drivers
Avoiding accidents and reducing the consequences of accidents: this is the comprehensive approach adopted by Mercedes-Benz in its safety research and referred to collectively by the company as &qu ...

Switching on/off
The three blue indicator lamps in the buttons indicate the ventilation level you have selected. If the battery voltage is too low, the seat ventilation may switch off. - Make sure that ...