| Vehicles with 4-cyl. engine and no heater coolant shut-off valve -N279- |
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| Vehicles with 4-cyl. engine are not provided with a heater coolant shut-off valve -N279- at present. Vehicles manufactured up to Model Year 2005 may be fitted with a shut-off valve, but this is not actuated (the auxiliary heater control unit -J364- must be encoded accordingly) → Chapter (Encoding auxiliary heater). |
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| At the start of production (up to Model Year 2004), vehicles with 4-cyl. engine were fitted with the heater coolant shut-off valve -N279-. However, in view of the fact that cold starting problems may be encountered with these engines at very low ambient temperatures following auxiliary heating operation with a small coolant circuit (engine is only slightly pre-heated), the auxiliary heater control unit -J364- is to be encoded such that the heater coolant shut-off valve -N279- is not actuated. |
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| Depending on the engine version, the tubing from the engine to the auxiliary heater/from the heat exchanger to the engine may differ from this illustration → Cooling; Rep. Gr.19. |
| “→” Direction of coolant flow (with engine running and in auxiliary heating mode). |
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