Saab 9-5 2011 Owner's Manual page 99

98 Instruments and controls
Boost gauge
The turbo gage indicates the air vol‐
ume for combustion, which is equiva‐
lent to the engine load.
Under certain barometric conditions,
the needle may enter the first part of
the red zone.
If the needle repeatedly enters the red
zone and the engine loses power at
the same time, seek the assistance of
a workshop.
Engine coolant
temperature gauge
Displays the coolant temperature.
Red area = Temperature too high
Central = Normal operating tem‐
area perature
Lower = Engine operating tem‐
area perature not yet
reached
Caution
If engine coolant temperature is
too high, stop the vehicle and al‐
low the engine to idle. If the needle
continues to rise into the red zone,
switch off the engine. Check the
coolant level.
9 Warning
Never open the expansion tank
cap completely when the engine is
hot; open with care. The pressure
in the cooling system could cause
hot coolant and steam to be re‐
leased. Failure to heed this warn‐
ing could result in personal injury.
Service display
The engine oil life system lets you
know when it is time for service.
Based on driving conditions, the in‐
terval at which an engine oil and filter
change will be indicated can vary con‐
siderably.