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General instructions/safety instructions

The following points must be observed during vehicle diagnosis:

CAUTION: Danger of damage due to improper handling of batteries and control unit plug connections!
  • Disconnect the battery connection terminals only when the engine is switched off!
  • Start the engine only when the battery connection terminals are properly connected!
  • Pull off or push on plug connections for the control units or other electronic components only when the ignition is switched off!
  • Before carrying out welding work on the vehicle, always disconnect the negative terminal of the battery and pull off all plug connections to the 'vehicle electrical system control unit'!