First read and observe the introductory information
and safety warnings
Please follow these rules to help prevent damage to your vehicle when driving through water, for example if the road is flooded:

WARNING

NOTICE
Checklist
Technical dataRemoving and installing gas discharge bulb control unit -J343-/-J344-
WARNING
Risk of death due to high voltage! Risk of injury
and environmental pollution!
Observe operation and safety notes for gas discharge
bulbs
→ Chapte ...
Safety precautions when working on vehicles with high-voltage system
Risk of death due to high voltage
The high voltage system carries high voltage. Electrical shocks will
cause serious injuries or death.
–
People having electronic medical devices for life support or health
maintenance in or on their bodies are pro ...
Switching off auxiliary and supplementary heater
If the button instant heat button has been pressed, or after
the preset operating time has expired or the coolant has reached
a temperature of 88° C, the combustion is ended and the run-on
mode begins. The circulation pump -V55- and the combustion air
...