Opel Speedster Operation, Safety, Maintenance Manual page 36

Instruments, cigarette lighter
illumination
Comes on when headlamps are switched on.
To adjust the brightness of the instrument
illumination press and hold the trip odometer
button (arrowed). The instruments cycle
through 4 levels of brightness, release the
button when the desired level has been
reached. Trip odometer, see page 19.
Headlamps when driving abroad
The asymmetrical dipped beam increases the
field of vision on the near side of the lane.
When driving in countries which drive on the
opposite side of the road, this causes glare for
oncoming traffic.
To avoid glare, the headlamp glasses must be
provided with an appropriate black cover
strip.
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