| When working on the fuel system note the following warnings: |
WARNING | Risk of scalding - the temperature of the fuel and fuel lines can be as high as 100 °C. |
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| Allow the fuel to cool down before disconnecting the lines. |
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| Wear protective gloves. |
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| Observe the following to prevent damage to the injection and glow plug system: |
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| Always switch off the ignition before connecting or disconnecting electrical wiring for the injection or glow plug system or tester cables. |
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| Faults are stored in engine control unit if electrical connectors have been unplugged: |
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| Connect vehicle diagnostic, testing and information system -VAS 5051B-. |
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| Start “Self-diagnosis” mode. |
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| Interrogate fault memory. |
Caution | To prevent damage to the electronic components when disconnecting the battery: |
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| Observe notes on procedure for disconnecting the battery. |
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| Always switch off the ignition before disconnecting the battery. |
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| When working on the cooling system note the following warnings: |
WARNING | Hot steam/hot coolant can escape - risk of scalding. |
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| The cooling system is under pressure when the engine is hot. |
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| To allow pressure to dissipate, cover filler cap on expansion tank with cloth and open carefully. |
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| Note the following if testers and measuring instruments have to be used during a road test: |
WARNING | Persons sitting in the front passenger's seat could be seriously injured if the airbag is triggered. |
| Test equipment must always be secured on the rear seat and operated from that position by a second person. |
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