| Safety measures for avoiding personal injuries or irreversible damage to the injector and preheating system. |
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| Persons wearing a pacemaker should not lean over the engine compartment while the engine is running, as the injectors use high voltage pulses. |
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| The high-pressure fuel connections must not be opened when the engine is running. |
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| Always switch off the ignition before connecting or disconnecting injection and glow plug system wiring or tester cables. |
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| Always switch off ignition before cleaning engine. |
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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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| Certain tests may lead to a deviation being detected by the control unit and stored. The event memory should therefore be interrogated and (if necessary) erased after completing the tests and any repair work that may be required. |
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