WARNING Risk of injury. Follow all Warnings and Safety Precautions. Refer to → Chapter "Warnings and Safety Precautions".
Caution In order to prevent damage to the battery or vehicle, observe battery type descriptions and notes. Refer to → Chapter "Types of Batteries".
To guarantee a long service life, the battery must be checked, serviced and maintained as described in this manual. In addition to supplying the power to start the engine, the battery acts as a power reserve for the entire vehicle electrical system.
Types of Batteries
General Information
Caution The following batteries described are maintenance-free batteries. Do not remove any of the labels on the battery and do not add distilled water. Only perform a visual inspection. Note the chapter on battery testing. Refer to → Chapter "Battery, Checking".
Battery with Visual Indicator, Standard
This is a maintenance-free battery with liquid electrolyte (wet battery).
WARNING Do not check or charge batteries that have a visual indicator that is bright yellow. Jump starting must not be used!
There is a risk of explosion during testing, charging or jump starting.
These batteries must be replaced.
This battery has a visual indicator. The visual indicator shows the state of charge and the battery acid level. Visual indicator, checking. Refer to → Chapter "Visual Display in Battery Cover, Checking".
Battery with Visual Indicator, Enhanced
This is a maintenance-free battery with liquid electrolyte (wet battery).
Caution Do not remove any of the labels on the battery and do not add distilled water. Only perform a visual inspection. Note the chapter on battery testing. Refer to → Chapter "Battery, Checking".
WARNING Do not check or charge batteries that have a visual indicator that is bright yellow. Jump starting must not be used!
There is a risk of explosion during testing, charging or jump starting.
These batteries must be replaced.
The battery is installed in certain Stop/Start vehicles due to special requirements. "EFB" is written on the battery cover to identify this battery. "EFB" stands for "enhanced flooded battery" (enhanced wet battery).
An "EFB" battery may only be replaced with another "EFB" battery.
An "EFB" battery has a visual indicator for checking the battery electrolyte level. Visual indicator, checking. Refer to → Chapter "Visual Display in Battery Cover, Checking". Note "EFB" batteries are being installed in smaller gasoline engines with the Stop/Start system and a manual transmission from 05/2011.
AGM Battery
Maintenance-Free Battery with Specific Electrolyte without a Visual Indicator
Lead-acid battery, where the electrolyte is fixed in an absorbent glass mat (AGM). The battery is closed and equipped with breather valves.
AGM is the English abbreviation for Absorbent Glass Mat.
These batteries do not have a visual indicator because the electrolyte level is predetermined. AGM is on the battery to identify it. Note
Always replace an AGM battery with another AGM battery.
Warnings and Safety Precautions
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Test yourself
A quick Volkswagen Touran quiz: every answer comes with an explanation and a link to the manual page.
WARNING Risk of injury. Follow all Warnings and Safety Precautions. Refer to → Chapter "Warnings and Safety Precautions".
Caution In order to prevent damage to the battery or vehicle, observe battery type descriptions and notes. Refer to → Chapter "Types of Batteries".
Note "EFB" batteries are being installed in smaller gasoline engines with the Stop/Start system and a manual transmission from 05/2011.