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Battery in engine compartment, removing and installing

Removing 

CAUTION:
CAUTION: Before beginning repairs on the electrical system:
  • Where applicable, obtain anti-theft radio security code.
  • Switch off all electrical consumers.
  • Switch the ignition off and remove ignition key.
  • Disconnect negative ( - ) battery terminal.
  • On vehicles equipped with Audi Telematics by OnStar (R) , switch-off the emergency (back-up) battery for the Telematic/Telephone Control Module prior to disconnecting vehicle battery → 91 - COMMUNICATION
  • After reconnecting vehicle battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows according to Repair Information and/or Owners Manual.
  • After reconnecting vehicle battery on vehicles equipped with Audi Telematics by OnStar (R) , switch-on the emergency (back-up) battery for the Telematic/Telephone Control Module → 91 - COMMUNICATION

Special tools, testers and auxiliary items required 

Fig 1: Identifying Torque Wrench V.A.G. 1331
GW00000113Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig 2: Identifying Plenum Chamber Cover & Removing Rubber Seal
GW00014442Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig 3: Locating Battery Terminals On Battery
GW00021564Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
  • On vehicles with suspension cross-brace, hex socket bolt - 4  - must be removed using an Allen key with ball head.
  • Loosen bolt enough so that ball head of Allen key contacts suspension cross-brace.
  • Leave bolt and securing bracket in place and swivel battery out from under hold-down bracket.
Fig 4: Identifying Angle Piece Of Central Gas Venting System
GW00021565Courtesy of VOLKSWAGEN UNITED STATES, INC.
CAUTION: When disposing batteries it is absolutely necessary that the disposal procedures for batteries and sulfuric acid are observed.

Installing 

Install in reverse order of removal, noting the following:

NOTE:
  • Only maintenance-free batteries conforming to standards "TL82506" (as of December 1997) and "VW75073" (as of August 2001) may be installed.
  • 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.
Fig 5: Battery Foot Strip Cut-Out
GW00004099Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig 6: Center Cut-Out In Battery Foot Strip Aligned With Threaded Hole In Battery Carrier
GW00004100Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig 7: Locating Battery Terminals On Battery
GW00021564Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
  • Lug on battery retainer must engage in recess on battery base strip.

Reconnect battery in the following sequence with ignition and electrical equipment switched off:

The following steps are required after reconnecting battery:

NOTE:
  • When reconnecting battery, activate vehicle equipment (radio/radio navigation system, clock, electric window lifters) in accordance with Owners Manual.
  • On vehicles equipped with Audi Telematics by OnStar (R) , switch on emergency (back-up) battery → 91 - COMMUNICATION .
  • Further measures after reconnecting the voltage supply, refer to appropriate engine repair information, RG 24.
  • Check proper function of remote control keys; adapt keys if necessary. Inform customer that all additional keys must also be adapted to ensure that the remote control works properly Owners Manual.
  • After re-connecting battery, the ESP indicator lamp will go out only after driving a distance of several meters.

Tightening torques 

Component - fastener Nm
Battery hold-down bracket - nut 12
Battery terminal to battery post - nut 7.5
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