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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 ...

Notes on care
Regular care of your vehicle is a condition for retaining the quality in the long term. Use care products and cleaning agents recommended and approved by Mercedes- Benz. WARNING Many cleanin ...

Clearing the memory of the integrated garage door opener on the rear-view mirror
Turn the SmartKey to position 2 in the ignition lock. Press transmitter buttons 2 and 4. The indicator lamp lights up yellow. Press and hold transmitter buttons 2 and 4 until the indic ...