Instrument panel lighting

The instrument panel lighting illuminates when
the ignition key is in position II and the light
switch (1) is in either position 
Move the thumb wheel (4) up to increase brightness or down to decrease brightness.
See also:
Use of Additives
With the exception of gas line antifreeze during
winter months, do not add solvents, thickeners,
or other store-bought additives to your
vehicle's fuel, cooling, or lubricating systems.
Overuse ...
C70 in the Market
The C70 is a good luxury convertible, but it's in a class where good might
not be enough. Competitors — notably the Mercedes-Benz E-Class — do a better job
of protecting those in the car from buff ...
The front airbag system
The front airbags supplement the three-point seat belts. For these airbags to
provide the protection intended, seat belts must be worn at all times.
The front airbag system includes gas generator ...
