| All work on the electrical system must be carried out only by qualified persons in possession of the technical knowledge required. |
WARNING | Danger of electrical shock. |
| Engine preheater operates with 230 V or 115 V current from the mains. |
| Before working on engine preheater, pull plug from mains socket. |
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| Remove yellow "pull-off protection" -4- from electrical connector and pull off connector. Seal connector to prevent ingress of coolant (danger of short circuit). |
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| Clamp off coolant hoses -1- and -2- with hose clamps up to 40 mm Ø -3093-. |
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| Set drip tray -V.A.G 1306- under vehicle. |
WARNING | Danger of scalding injuries. |
| When the engine is warm, the coolant temperature may be above 100 °C. The cooling system is pressurised. |
| If necessary, release pressure and reduce temperature before carrying out repairs. |
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| Loosen O-type or screw-type clips and pull coolant hoses off heating element -3-. |
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