| To avoid personal injury and/or damage to the injection system and ignition, proceed as follows: |
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| Do not touch or remove the injection wiring with the engine running or the ignition on. |
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| Always switch off the ignition before disconnecting or connecting the wiring of the injection system and ignition, or the wiring of the test units. |
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| To turn the engine over with the ignition on without it starting up, e.g. to test the compression, remove the connector from the ignition transformer. |
| If the use of test and measurement units is required during a road test, proceed as follows: |
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| Always install the test and measurement units in the rear seat to be operated from there by a second mechanic. |
| Operating the test and measurement units from the front passenger seat could result in injury should the airbag be activated in the event of an accident. |
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| To turn the engine over with the ignition on without it starting up: |
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| Remove the air filter → Fig.. |
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