
Fig. 131 The front left of the bumper: connection for engine preheating ②
First read and observe the introductory information
and safety warnings In engine preheating mode, the engine coolant is heated slowly using a heating element while the vehicle is stationary. To do so, the cables supplied with the vehicle must be connected to a 230-volt socket or a 115-volt socket, e.g. in a garage. The engine will reach its operating temperature much more quickly if the vehicle is switched on when the coolant has been preheated. This reduces fuel consumption and exhaust emissions during the warm-up phase.
Preheating the engine can take up to 3 hours depending on the outside temperature .
Connecting the engine preheating system

WARNING

WARNING
It is sufficient to test the residual current circuit breaker once a month if the engine preheating system is only used occasionally. If it is used regularly, have it checked once a week.
Electronic immobilizer
Changing gearDisconnecting and connecting battery, vehicles with high-voltage system
Caution
Observe the following instructions and precautions
on safety when working on pyrotechnic components:
Contrary to the following description, the battery
must be disconnected ...
Rear brakes
The type of brake system installed in the vehicle is
indicated among other things by the corresponding PR number on
the vehicle data sticker.
The vehicle data sticker can be found in the spare wheel
well and in the service schedule.
...
Removing and installing auxiliary heater bracket
Removing
–
Switch off electrical consumers.
–
Switch off auxiliary and supplementary heater and switch off
ignition.
–
Remove auxiliary heater
→  ...