Depending on the vehicle equipment, an additional bracket must be removed to see the viewing window. An additional tool that is not available in the vehicle tool ki
is required to do this. Always have the acid level of the 12 V vehicle battery checked by an authorized Volkswagen dealer or authorized Volkswagen Service Facility
Volkswagen recommends contacting an authorized Volkswagen dealer or authorized Volkswagen Service Facility.
Fig. 196 On the top of the 12 V vehicle battery: Window (general example).
Make sure there is enough lighting to clearly see the color indicator in the circular window on the top of the 12 V vehicle battery fig. 196.
The color indicator in the circular window changes depending on the acid level in the 12 V vehicle battery.
Light yellow or colorless The 12 V vehicle battery acid level is too low. Have the 12 V vehicle battery replaced by an authorized Volkswagen dealer or authorized
Volkswagen Service Facility. Volkswagen recommends contacting an authorized Volkswagen dealer or authorized Volkswagen Service Facility.
Black
The 12 V vehicle battery acid level is OK.
The acid level of 12 V vehicle batteries labeled AGM cannot be checked for technical reasons. Suitably qualified professionals can inspect the battery. Volkswagen
recommends contacting an authorized Volkswagen dealer or authorized Volkswagen Service Facility.
Charging, replacing, disconnecting, or connecting the 12 V vehicle battery
Please read the introductory information and heed the Warnings and Notice ⇒
Safety precautions for working in the engine compartment .
If you suspect that the 12 V vehicle battery is damaged or malfunctioning, see suitably qualified professionals to have the 12 V vehicle battery checked. Volkswagen
recommends contacting an authorized Volkswagen dealer or authorized Volkswagen Service Facility.
Charging the 12 V vehicle battery
The 12 V vehicle battery should be charged by suitably qualified professionals because the 12 V vehicle battery that is installed at the factory requires a charging
process where the voltage is limited ⇒
. Volkswagen recommends contacting an authorized Volkswagen dealer or authorized Volkswagen Service Facility.
Replacing the 12 V vehicle battery
The 12 V vehicle battery is designed to fit the location where it is installed and is equipped with safety features. If a 12 V vehicle battery needs to be replaced, have
the replacement part fitted by qualified professionals. Volkswagen recommends contacting an authorized Volkswagen dealer or authorized Volkswagen Service
Facility. Check with qualified professionals to find out the component information regarding size and the required maintenance, performance, and safety features.
They must possess the necessary technical documentation and equipment. Volkswagen recommends contacting an authorized Volkswagen dealer or authorized
Volkswagen Service Facility. The vent opening on the 12 V vehicle battery must always be located on the negative terminal side. The vent opening on the positive
terminal side must always be sealed ⇒
.
Only use a maintenance-free 12 V vehicle battery that conforms to the TL 825 06 and VW 7 50 73 standards. These standards must be from October 2014 or later.
Always have the 12 V vehicle battery replaced by qualified professionals because the vehicle electronics must be adapted as part of the replacement. Only qualified
professionals have the necessary equipment to perform the adaptation and have access to the correct replacement batteries.
Disconnecting the 12 V vehicle battery
If the 12 V vehicle battery must be disconnected from the vehicle electrical system, note the following:
1. Switch off all electrical consumers.
2. Unlock the vehicle before disconnecting the battery. Otherwise, the anti-theft alarm system will be triggered.
3. Disconnect the negative cable first, and then the positive cable ⇒
.
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