The combiner and mirror surface have a special coating. When cleaning it, do not use a hard cloth, a cloth with a rough surface, or cleaning detergent. Use a finetextured, soft cloth.
If a chemical solvent gets on the combiner or mirror surface, wipe it off immediately. Otherwise, they could be damaged and the surface coating could be scratched.
Mazda 6 Owners Manual: Instrument cluster removal/installation
Caution
When replacing the instrument cluster, the configuration procedure must be
performed before removing the instrument cluster. If the configuration procedure
is not performed before removing the instrument cluster, it is possible that the
instrument cluster will not operate normally. ...
Mazda 6 Owners Manual: Rear wiper motor inspection
1. Disconnect the negative battery cable.
2. Remove the liftgate lower trim. (See LIFTGATE LOWER TRIM
REMOVAL/INSTALLATION)
3. Disconnect the rear wiper motor connector.
4. Connect battery positive voltage to the rear wiper motor terminal A and
the ground to a bare metal part of the vehicle a ...