Fig. 131 The front left of the bumper: connection for engine preheating ②
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.
Assembly overview - speed sensor on rear axle, front-wheel drive
1 -
ABS speed sensor
Clean inside surface of hole before inserting sensor
Coat inside surface with high-temperature paste -G 052 112 A3-
Removing and installing
→ Chapter
2 -
Bolt
...
Test and measurement work that can be performed using a pressure gauge
Displays on the pressure gauge
1 -
Temperature scale for refrigerant R134a CF3–CH2F or
CH2F–CF3.
2 -
Pressure scale
In addition to the pressure scale, the pressure gau ...
Notes for vehicles with start-stop system
Observe the safety precautions for vehicles with a
start-stop system
→ Chapter.
If a start-stop system is installed, the following abort
conditions will deactivate the start-stop function:
The star ...