Battery With Visual Indicator

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CAUTION:

There is risk of explosion if the visual indicator is colorless or light yellow!

Do not jump start the vehicle.
Do not check or charge the battery.
Replace the battery.

Special tools and workshop equipment required

Torque Wrench 1410 :VAG1410 , measuring range: 4 through 20 Nm
Or: Torque Wrench 1783 - 2-10Nm :VAG1783 , measuring range: 2 to 10 Nm
Or: Mini Torque Wrench :VAS6854 , measuring range: 5 to 13 Nm
Or: Electronic Torque Wrench 3-60Nm :VAS6583 , measuring range 3 to 60 Nm
Or: Torque Wrench 1331 5-50Nm :VAG1331 , measuring range: 6 to 50 Nm

Tightening Specification Table for Installation:

Component / Fastening Element	[Nm]
Pressure reservoir nut	9

The battery is located in the luggage compartment under the luggage compartment floor.

Removal Procedures:

-- Raise the luggage compartment floor covering and secure.

-- Applies to vehicles with air suspension ("adaptive air suspension"): Remove the nuts -arrows- and move the pressure reservoir with the lines -1- still attached and the solenoid valve block -2- to the side.

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-- Remove the vehicle tool box.

Procedure:

-- Check the battery housing for the following:

Corrosion or damage to the battery terminals
Mechanical damage to the battery housing or cover, recognizable by electrolyte leakage or crystallization on the damaged location.

-- Replace damaged batteries.

-- Before checking the electrolyte level, carefully tap on the visual indicator -arrow- with the handle of a screwdriver.

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-- Read the battery electrolyte level using the color display. Two different results are possible:

Color display on visual indicator:	Action:
Black or green	Battery electrolyte level is OK: no further action necessary.
Colorless or light yellow	Battery electrolyte level too low: the battery must be replaced.

Installation procedures occur in reverse order. While doing so, note the tightening specifications. Refer to BATTERY WITH VISUAL INDICATOR for the installation tightening specification table.

NOTE:

The visual indicator is also called the ALI (Acid Level Indicator).

Only use the visual indicator for assessing the electrolyte level!

Bubbles can build up under the visual indicator when the battery is charging and also while driving, causing the color display to be incorrect. Gently tapping on the visual indicator dissolves these bubbles.