See also:

Interior rearview mirror
Auto-dim function An integrated sensor reacts to headlights from following traffic and automatically reduces glare in the mirror. ...

Fuse box in the passenger compartment, behind the plastic cover, driver's side
This fuse box is located behind the plastic cover below the steering wheel. When replacing a blown fuse, be sure to replace it with a new one of the same color and amperage (written on the fuse) ...

Deposit control gasoline (detergent additives)
Volvo recommends the use of detergent gasoline to control engine deposits. Detergent gasoline is effective in keeping injectors and intake valves clean. Consistent use of deposit control gasolines ...