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Spark Plug Check And Cleaning: Notes

Required Special Tool 

MB992273: Spark Plug Brush

CAUTION:
  • Never attempt to adjust the gap of the iridium plug.
  • Do not attempt to clean the iridium plug using a wire brush because it may result in damage to the electrode. When the iridium plug is cleaned, special tool spark plug brush (MB992273).
NOTE: Obey the maintenance interval of the relevant vehicle for the spark plug replacement. If the plug gap and insulation resistance are normal, check the plug condition and clean if necessary.

For removal and installation procedure of the spark plug, (refer to REMOVAL AND INSTALLATION ).