Battery Without Visual Indicator

WARNING: This page is about a different car, the 2024 Audi A4 allroad. However, it is still accessible from the selected car via links, so may be relevant.

The battery is in the luggage compartment.

Removal Procedures:

-- Raise the luggage compartment floor covering and secure.

-- Remove the nut -1- for the vehicle tool kit and remove the cover with the vehicle tool kit -2- or temporary spare tire.

Fig 1: Battery Holder With Bolt

Courtesy of AUDI OF AMERICA, LLC

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.

-- Check the electrolyte level of all battery cells with the markings in the housing.

-- If the electrolyte level of at least one battery cell is under the MIN mark, replace the battery.

Installation procedures occur in reverse order.

NOTE:

Use a bright flashlight to see the MIN and MAX markings better in the housing.

If it is difficult to read the battery, use a small mirror to check the electrolyte level while holding a bright flashlight at a right angle behind the battery cells.