You need a CR 2450 lithium battery, which can
be obtained from any qualified specialist work-
shop.
X
Press a pointed object into recess :.
X
Slide battery cover ; backwards in the direc-
tion of the arrow.
X
Remove battery =.
X
Insert the new clean battery with the lettering
facing upwards. Use a lint-free cloth to do so.
X
Slide battery cover ; in the opposite direc-
tion to the arrow on the remote control until it
engages.
X
Check all the functions of the remote control.
Problems with the auxiliary heating
Corresponding messages may also be shown in the display of the on-board computer
(Y page 278).
Problem
Possible causes/consequences and M Solutions
The display of the
remote control shows
the FAIL message and
¨ symbol.
There is no connection between the remote control and the receiver in
the vehicle.
X
Change your position in relation to the vehicle, e.g. hold the remote
control higher or to the side.
X
Move closer.
The display of the
remote control shows
the FAIL message and
¯ symbol.
A malfunction has occurred. The auxiliary heating switches off auto-
matically.
X
Have the auxiliary heating checked at a qualified specialist work-
shop.
The display of the
remote control shows
the FAIL message.
Lack of fuel.
The fuel tank is less than Õ full. The auxiliary heating switches off
automatically.
X
Refuel at the nearest filling station.
X
Subsequently, start the auxiliary heating several times until the fuel
lines are full.
The display of the
remote control shows
the FAIL message.
The on-board voltage is too low. The auxiliary heating has switched
itself off or cannot be switched on.
X
Drive for a considerable distance.
The battery charges. The auxiliary heating is operational again as
soon as the on-board electrical system voltage is sufficient.
The auxiliary heating sys-
tem switches off auto-
matically and/or cannot
be switched on.
The fuel tank is less than Õ full. The auxiliary heating switches off
automatically.
X
Refuel at the nearest filling station.
X
Subsequently, start the auxiliary heating several times until the fuel
lines are full.
Operating the auxiliary heating system
149
Climate control
Z
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