Other information:
The lighting panel and controls can be used to adjust both exterior and interior
lighting. The lighting ring on the left-side steering wheel lever can be used to
activate and adjust the exterior lighting. The brightness of the interior lighting
can be adjusted using the thumb wheel on the dashboard...
Incorrectly connected or installed accessories or extra equipment may have
an adverse effect on the vehicle's electronics.
We strongly recommend that Volvo owners use only genuine, Volvo-approved accessories,
and that accessory installations be performed only by a trained and qualified Volvo
service technician...