Cleaning External Plastic, Rubber and Trim Components
The vehicle should be washed as soon as it becomes dirty. The longer dirt remains, the more difficult it will be to keep the vehicle clean. It could also lead to paint damage. Use a car wash detergent recommended by Volvo.
A special cleaning agent available from Volvo retailers is recommended for the cleaning and care of colored plastic parts, rubber and trim components, e.g. glossy trim. Follow the instructions for use of the cleaning agent carefully.
Avoid using car washing detergents with a pH value lower than 3.5 or higher than 11.5. Doing so could result in the discoloring of anodized aluminum surfaces* (as shown in the illustrations below). Abrasive polishing agents are not recommended for these areas (as shown in the illustrations below).

Components that should be washed with a cleaning product with a pH value between 3.5 and 11.5.
* Option/accessory.
Test yourself
A quick Volvo XC90 quiz: every answer comes with an explanation and a link to the manual page.