See also:

Warning and indicator lamps
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Activating cruise control
You can adopt the current speed if you are driving faster than 20 mph (30 km/h). – Accelerate the vehicle to the desired speed. – Briefly press the cruise control lever up 1 or down 2. – Remo ...

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 ...