Audi Workshop Service and Repair Manuals

Removing and installing battery Removing   Caution On vehicles fitted with telematics system, activate service mode of telematics control unit before disconnecting battery → Rep. Gr.91. –  Note code (obtain if necessary) for vehicles with encoded radio/radio navigation system (other manufacturers only). –  Switch off ignition.

–  Detach rubber seal of plenum chamber cover in direction of -arrow-. –  Remove plenum chamber cover -1- to front. –  Connect battery charger to provide back-up power supply → Chapter.

–  Loosen nut several turns and disconnect battery clamp -1- of earth cable from battery terminal post. –  Loosen nut several turns and disconnect battery clamp -2- of positive cable from battery terminal post. –  Unscrew bolt -4- using a ball head hexagon key until the bolt head just touches the body brace. –  Leave hexagon socket head bolt and retainer plate -3- fitted and swivel out battery from underneath.

–  Disconnect hose -arrow- for central gas venting system. –  Lift battery out of plenum chamber.   WARNING Observe environmental requirements. When disposing of used batteries, always observe the required disposal procedures for batteries and sulphuric acid → Electrical system; General information; Rep. Gr.27. Installing Installation is carried out in the reverse order; note the following:   Note t  Only install maintenance-free batteries with the specifications “TL82506” (from December 1997 onwards) and “VW75073” (from August 2001 onwards). t  Batteries from the Audi parts range feature a base strip adapter for matching to different retainer flanges. The battery operating instructions give details of when and how to use the base strip adapter.

–  Insert battery in battery carrier so that lug at rear of battery carrier -arrow- engages in recess in battery base strip -1-. l  It should no longer be possible to move the battery.

–  The battery has been properly inserted if the centre recess in the battery base strip aligns with the tapped hole in the battery tray -arrows-.

–  Secure battery retainer plate -3- with hexagon socket head bolt -4-.   Note Lug on battery retainer plate must engage in recess on battery base strip. Connect up battery in the following sequence with ignition and electrical equipment switched off: –  First connect battery clamp -2- of positive cable by hand to battery positive terminal “+” and tighten nut. –  Attach battery clamp -1- on earth cable to negative battery terminal “–” by hand and tighten nut. –  Connect hose for central gas venting system. Observe notes in → Electrical system; General information; Rep. Gr.27. –  After installation, check that battery is securely attached → Electrical system; General information; Rep. Gr.27. –  Switch off back-up power supply from battery charger. If battery was removed and installed without back-up power supply, perform following procedures after connecting the battery: t  Activate vehicle equipment (radio, radio/navigation system, clock, electric windows) → Owner's manual. t  Deactivate service mode of telematics control unit → Rep. Gr.91. t  Check proper function of remote control keys; synchronise keys if necessary. Inform customer that all additional keys must also be synchronised to ensure that the remote control works properly → Owner's Manual. t  Interrogate fault memories of all control units and erase “Low voltage” fault if necessary → Vehicle diagnosis, testing and information system VAS 5051.   Note After re-connecting voltage supply the ESP warning lamp will go out only after driving a distance of several meters. Tightening torques

Component	Nm
Battery cable clamp to battery terminal	7.5
Bolt to retainer plate	12