Mounting instruction, cylinder block heating for the 95XF

Installation of the cylinder block heating




Drain the coolant.


Remove the two expansion plugs (1) from the cylinder block.
The expansion plugs in question are shown in Fig. A.
If no rear noise encapsulation is used, two more expansion plugs (2) should be removed (see Fig. A).


Tap with a drift on the edge of the plate (Fig. B).



The plate then tilts and can be removed with water pump pliers.
(Fig. C).







Lay the cable with connecting plug along the existing wiring in the engine compartment.
Slide the plug connector right together between the heating element and the cable, so that the O-ring seals properly and there is no space between them.




Apply a few drops of oil to the O-ring.
This facilitates coupling up.
It is essential to make the connection in this way (Fig. D).
Then fit the circlips.


Deburr the hole in which the two expansion plugs were located carefully on the outside. Sparingly oil the sealing ring and attach the heating elements in the expansion plug holes (Figs. E and F).

The element can burn out due to:

- dirty coolant
- insufficient coolant
- air in the cooling system
- sediment in the cooling system
- radiator sealing compound in the


5 Fill the cooling system with coolant and bleed it as described in the workshop manual.
Start the engine and check for leaks.

Installing the 220V connector

Attach the 220V connector at a suitable place where it is protected against splash water and mechanical damage. The connector has a pushthrough section (see arrow, Fig. G) where a drain opening for condensation can be drilled. Drill this opening in such a way that any water which penetrates into the hollow cavity of the connector can drain off.
The connector is provided with metal lips for earthing to the chassis. To obtain a good earth, all paint and dirt on the bodywork at one of the attachment lips should be removed. Screw the 220V connector tight with the fasteners supplied with it as shown in Fig. G.


  1. For the current supply, the element should be connected up to an earthed socket. There must be a continuous internal earth connection from the housing of the heating element via the bodywork to the earthed 220V connector.

  2. The sheath of the cable between the 220V connector and the plug should be of oil-resistant rubber (at least 3 x 1.5 mm2 cores). The plug should be made of a thermoplastic material in a moistureproof version. Make sure that the cable lies clear and is not clamped by a sharp object. This can damage the insulation.