Automatic Switch-Off For Electrical Consumers; Battery Switch-Off In An Accident With Airbag Triggered; How The Vehicle Battery Discharges - Volkswagen Tiguan Owner's Manual

Bedienungsanleitung < Service & Zubehör < Volkswagen Deutschland
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Automatic switch-off for electrical consumers

The intelligent vehicle electrical system automatically implements a range of measures to prevent the vehicle battery from discharging under high
loads:
The idling speed is increased so that the alternator provides more electricity.
The performance of large electrical consumers may be reduced or they may be switched off completely.
The supply of electricity to the 12-volt sockets and the cigarette lighter is interrupted temporarily while the engine is being started.
The vehicle electrical system cannot always prevent the vehicle battery from discharging. For example when the ignition is switched on for an
extended period with the engine off, or when the side or parking lights are on when the vehicle is parked for an extended period.

Battery switch-off in an accident with airbag triggered

Depending on the vehicle equipment level, in the event of an accident where the airbags are deployed, the electrical connection to the battery is
automatically disconnected by a pyrotechnic device. This prevents short-circuiting.

How the vehicle battery discharges

Long periods at a standstill in which the engine is not running, especially if the ignition is switched on.
The use of electrical consumers when the engine is switched off.
When the auxiliary heater is being used
WARNING
Incorrectly attaching the battery and using incorrect vehicle batteries can cause short circuits, fire and serious injuries.
Always use maintenance-free and leak-proof batteries that have the same properties, specifications and dimensions as the factory-fitted
vehicle battery.
WARNING
A highly explosive mixture of gases is given off when the vehicle battery is being charged.
Vehicle batteries should only be charged in well-ventilated spaces.
Never charge a vehicle battery once it has been frozen. Discharged vehicle batteries can even freeze at temperatures of around
0°C (+32°F).
The vehicle battery has to be replaced if it has ever been frozen.
Incorrectly connected cables can cause a short circuit. First connect the positive cable and then the negative cable.
NOTICE
Never make or break connections between vehicle batteries if the ignition is switched on or the engine is running. Never use a vehicle
battery that does not correspond with the vehicle's specifications. This can damage the electrical system or electronic components, which
can cause electrical faults.
Never connect equipment that provides electricity, such as solar panels or a battery charger, to the 12-volt socket or to the cigarette lighter
to charge the vehicle battery This can damage the vehicle electrical system.
Dispose of the vehicle battery as required by legislation. Batteries may contain toxic substances such as sulphuric acid and lead.
Electrolyte can pollute the environment. Clean up any service fluid leakages and dispose of them properly.
→ Auxiliary heating and ventilation .