Volkswagen Golf GTI 2016, Owner'S Manual

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If the battery was disconnected for a long time, the next scheduled
service may not be correctly calculated and displayed → Instrument
cluster . The maximum permissible service and maintenance
intervals 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 → Unlocking or
locking the vehicle with Keyless Access . 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.