| Safety measures for working on vehicles with auxiliary heaters |
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| The auxiliary heater must not be in operation or switched on in areas in which there is a risk of fire or explosion. |
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| The auxiliary heater must not be in operation or switched on (including via a preset switch-on time) in closed rooms without an exhaust extraction system. |
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| When working on the fuel system, always observe applicable safety regulations → Rep. gr.20. |
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| If fuel system components (e.g. metering pump, fuel lines, fuel gauge sender) are removed or opened, the engine must not be started. |
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| Before beginning repair work on the auxiliary heater: |
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| Release pressure in cooling system by carefully opening cap on coolant expansion tank. |
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| After completing repair work on the auxiliary heater or the fuel system, check the operation of the auxiliary heater. |
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| After completing repairs on the auxiliary heater, carry out self-diagnosis using vehicle diagnosis, testing and information system -VAS 505X-. |
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