See also:

Automatic locking feature
The vehicle locks automatically when the ignition is switched on and the wheels of the vehicle are turning at a speed of more than 9 mph (15 km/h). You could therefore be locked out when: - ...

Checking the coolant level
Only check the coolant level when the vehicle is on a level surface and the engine has cooled down. ► Turn the SmartKey to position 2 in the ignition lock. On vehicles with KEYLESS-GO, ...

Smaller tank, same range
Because the new Mercedes CLS models consume significantly less fuel, it has been possible to reduce the filling volume of the fuel tank in the four and six-cylinder models to 59 litres. The 80-lit ...