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Disconnecting the vehicle battery
If the battery must be disconnected from the vehicle's electrical system, note the following:
Switch off all electrical systems and devices and the ignition.
Unlock the vehicle before disconnecting the battery; otherwise the alarm system will go off.
First disconnect the negative cable (-) and then the positive cable (+) ⇒ .
Connecting the vehicle battery
Prior to reconnecting the battery, switch off all electrical systems and devices and the ignition.
Connect the positive cable (+) first and then the negative cable (-) ⇒ .
After the battery is connected and the ignition is switched on, different indicator lights may light up.
They should go out after you drive a short distance at 10–12mph (15–20km/h). If the indicator lights
do not go out, contact an authorized Volkswagen dealer or an authorized Volkswagen Service Facility
and have the vehicle checked.
If the battery was disconnected for a long time, the next scheduled service may not be correctly cal‐
culated and displayed ⇒Instrument cluster . The maximum permissible service and maintenance in‐
tervals are shown in the ⇒BookletWarranty and Maintenance,.
Vehicles with Keyless Access: If the ignition will not start after reconnecting the vehicle battery, lock
the vehicle from the outside and unlock it again ⇒Doors and power locking system . Then try to start
the ignition again. If the ignition cannot be switched on, contact an authorized Volkswagen dealer, an
authorized Volkswagen Service Facility, or another qualified workshop for assistance.
Automatic electrical load deactivation
If the vehicle battery drain is high, the intelligent onboard electrical system management automatically
takes steps to help prevent battery drain.
The idle speed is increased so that the alternator provides more power.
The power to devices that consume a lot of electricity is cut back or switched off completely.
When the engine is started, the power supply to the 12Volt sockets is temporarily interrupted.
The onboard electrical system management cannot always keep the battery from being drained. For
example, the battery will drain if the engine is not running, but the ignition is switched on or the park‐
ing lights are left on for a long time when parked.
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