Mercedes-Benz SLR McLaren. Operator's Manual.

Controls in detail
Instrument cluster
The temperature sensor is located in the
front bumper area. Due to its location, the
sensor can be affected by road or engine
heat during idling or slow driving. Therefore,
the accuracy of the displayed temperature
can only be verified by comparison to
a thermometer placed next the sensor, not
by comparison to external displays, e.g.
bank signs, etc.
When moving the vehicle into colder ambient
temperatures (e.g. when leaving your
garage), you will notice a delay before the
lower temperature is displayed.
A delay also occurs when ambient temperatures
rise. This prevents inaccurate temperature
indications caused by heat
radiated from the engine during idling or
slow driving.
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