Audi Workshop Service and Repair Manuals

Note:

Batteries from the Audi parts range feature a base strip adapter for matching to different fastening strips.

When and how the base strip adapter is to be used is described in the battery operating instructions.

• ‒ → Insert battery in battery carrier such that lug of battery carrier at rear -arrow- engages in recess in battery base strip -1-.
• ‒ It should no longer be possible to move battery

• ‒ → Battery has been properly inserted if centre recess in battery base strip coincides with tapped hole in battery carrier -arrows-.

Perform further installation in reverse order, paying attention to the following:

• ‒ Pay attention to notes on battery central gas venting system
  .

→ Connect up battery in the following sequence with ignition and electr. loads switched off:

• ‒ Attach pole shoe of positive wire by hand to battery positive terminal "+" and tighten nut -2- to 6 Nm.
• ‒ If applicable, screw busbar -1- for main fuse box to pole shoe of positive wire (6 Nm).
• ‒ Finally attach pole shoe of earth wire by hand to battery negative terminal "-" and tighten nut -3- to 6 Nm.
• ‒ Check tightness of battery following installation .

Notes:

• ◆ On re-connecting battery, remember to activate vehicle equipment (radio/radio navigation system, clock, electric window lifters) in line with owner's manual.
• ◆ Deactivate telematics control-unit service mode.

=> Radio, Telephone, Navigation; Repair Group 91

• ◆ For further operations after re-connecting power supply, refer to

=> Injection and Ignition System; Repair Group 24

Tightening torques

Batteries with central gas venting system

There are two types of battery with central gas venting system:

• ◆ Batteries with hose/connection at central gas venting system
• ◆ Batteries with no hose/connection at central gas venting system

Notes:

• ◆ The latest generation of batteries features a central gas venting system and a fine-mesh flame trap.
  Function: The gas produced on charging escapes centrally through a hole in the top cover. The fine-mesh flame trap which prevents ignition of the flammable gas in the battery is also located here.
  The fine-mesh flame trap consists of a small round fibre-glass mat with a diameter of approx. 15 mm and a thickness of 2 mm. It operates in a manner similar to a valve, i.e. it allows the gas produced by battery gassing to escape.
• ◆ Battery posts are no longer to be greased.
• ◆ Battery terminals are only to be connected by hand so as not to damage the battery casing.

Notes on operation of central gas venting system:

• ◆ On batteries with central gas venting hose/pipe, make sure that hose does not become disconnected as otherwise the battery will not be properly vented.
• ◆ → On batteries with no central gas venting hose/pipe, it is important to ensure that opening in top cover -arrow- is not clogged.

Checking firm attachment of battery

Possible dangers if battery is not firmly in position:

• ‒ Shorter service life due to vibration damage
• ‒ Damage to battery plates if battery not properly attached
• ‒ Damage to battery casing caused by bracket (possible electrolyte leakage, high subsequent costs)
• ‒ Reduced crash safety
• ‒ To ensure that battery does not leak, only fit genuine battery caps.
• ‒ In the event of loss or damage, make exclusive use of genuine caps of the same type.
• ‒ The caps must be provided with an O-ring.