See also:

Windows fogged up on the inside
- Activate the cooling with air dehumidification function. - Activate automatic mode . - If the windows continue to fog up, activate the defrosting function. You should only select this s ...

Service and literature
Your vehicle is covered under the terms of the warranties printed in the Service and Warranty Information booklet. Your authorized Mercedes-Benz Center will exchange or repair any defective parts ...

Low outside temperatures
DEF freezes at a temperature of approximately 12 °F (–11 °C). The vehicle is equipped with a DEF preheating system when it leaves the factory. Winter operation is therefore also guaranteed at ...