| When working on the fuel systems take note of the following: |
WARNING | t
| Fuel system is under pressure! Before opening the system place a cloth around the connection. Then release pressure by carefully loosening the connection. |
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| Wear protection gloves. |
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| Observe the following to avoid injuries to persons and/or damage to the injection and ignition system: |
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| Always switch off the ignition before connecting or disconnecting electrical wiring for the injection or ignition system or tester cables. |
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| Certain tests may lead to a fault being detected by the engine control unit and stored in the memory. Therefore, after completing all checks and repairs, read-out the event memory and erase if necessary. After deleting the event memory, generate the readiness code in the engine control unit in the „guided functions“ mode → Vehicle diagnostic tester. |
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| Always switch off the ignition before cleaning the engine. |
Caution | t
| Follow steps required when disconnecting battery → Rep. gr.27. |
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| Only disconnect and connect the battery with the ignition switched off, otherwise the engine control unit may be damaged. |
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| When working on the coolant system take note of the following: |
WARNING | Hot coolant and vapours can cause burns! |
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| When the engine is hot the cooling system is under pressure. |
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| To reduce the system charge pressure, cover the expansion tank plug with a rag and open carefully. |
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| When working on the exhaust system, take note of the following: |
Caution | Risk of damage to the engine. |
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| Do not bend flexible connection more than 10°. |
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| Do not load the release element by pulling on it. |
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| Do not damage the cable of the release element. |
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| Note the following if testers and measuring instruments have to be used during a road test: |
WARNING | t
| Always attach the testers and measuring instruments to the rear seat and have them operated from there by a second person. |
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| If test and measuring instruments are operated from front passenger's seat and the vehicle is involved in an accident, there is a possibility that the person sitting in this seat may receive serious injuries when the airbag is triggered. |
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