04 Climate control
04
* Option/accessory, for more information, see Introduction.129
Engine and passenger compartment heater*
Preconditioning prepares the car's heater, engine and passenger compartment beforedeparture so that both wear and energyneeds during the journey are reduced. The heater can be started directly (p. 130) or with a timer (p. 130). The heater cannot start if the outside tem- perature exceeds 15 °C. At –5 °C or lower themaximum running time of the heater is 50minutes.
WARNING
Do not use the fuel-driven heater indoors. Exhaust gases are secreted.
NOTE
When the fuel-driven auxiliary heater is active there may be smoke from the right-hand wheel housing, which is perfectlynormal.
Refuelling
Warning label on fuel filler flap.
WARNING
Fuel which spills out could be ignited. Switch off the fuel-driven auxiliary heaterbefore starting to refuel. Check in the combined instrument panel that the heater is switched off. The heatsymbol is shown when it is operating.
Parking on a hillIf the car is parked on a steep hill, the front of the car should point downhill to ensure thatthere is a supply of fuel to the fuel-drivenheater.
Battery and fuelIf the battery has insufficient charge or thefuel level is too low, the heater will beswitched off automatically and a message appears on the information display. Acknowl-edge the message by pressing the indicatorstalk (p. 100)
OK button once.
IMPORTANT
Repeated use of the heater combined with short journeys leads to the battery dis-charging and consequential starting prob-lems. The car should be driven for the same time as the heater is used to ensure that thecar's battery is recharged adequately toreplace the energy consumed by theheater when it is used on a regular basis.The heater is used for a maximum of 50minutes each time.
Related information
• Engine block heater and passenger com- partment heater* - messages (p. 132)
• Additional heater* (p. 134)
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10 Maintenance and service
10
* Option/accessory, for more information, see Introduction.365
For more information on the car's battery - Electrical system (p. 410).
Battery - Start/Stop
Cars with the Start/Stop function are equip- ped with two 12 V batteries - one extra pow-erful battery for starting and one support bat-tery that helps during the Start/Stop func-tion's starting sequence. For more information on Start/Stop - see Start/Stop* (p. 279). For more information on the car's battery - see Jump starting with battery (p. 270) andStarter battery - specification (p. 411).
BatteryStartingAuxiliary
Cold start capacity
A
,
CCA (A)760180
Size B
,
L×W×H (mm)278×175×190150×90×130
Capacity (Ah)7010
A In accordance with the SAE standard.
B Largest possible size.
IMPORTANT
When replacing batteries in cars with the Start/Stop function, the AGM 12
type bat-
teries must be fitted.
NOTE
• The higher the current take-off in the car (extra cooling/heating, etc.) themore the batteries must be charged =increased fuel consumption.
• When the capacity of the battery hasfallen below the lowest permissiblelevel then the Start/Stop function isdisengaged.
Temporarily reduced Start/Stop function due to high current take-off means: •
The engine starts automatically 13
without
the driver depressing the clutch pedal (manual gearbox).
• The engine starts automatically withoutthe driver lifting his/her foot off the footbrake pedal (automatic gearbox).
12
Absorbed Glass Mat
13 Automatic starting can only take place if the gear lever is in neutral position.
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