Audi A4, S4

since 2000 release

Repair and operation of the car

Audi A4, S4
+ Introduction
+ Governing bodies and methods of safe operation
+ Current leaving and service
+ Engine
+ Cooling systems, heating and air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
- Systems of electric equipment of the engine
   + System of ignition and engine management
   + System of preheat of the diesel engine
   + Diagnostics of systems of electronic control and diagnostic equipment
   - Systems of charging and start
      General information
      The battery - the main data and acquisition of the new battery
      Check and charging of the battery
      Replacement of the battery
      Storage of the battery
      System of charging - general information and security measures
      Check of system of charging
      Removal and installation of the generator
      Removal and installation of the regulator tension/replacement of brushes
      System of start of the engine - the general information and precautionary measures
      Removal and installation of a starter
      Check of system of start of the engine
+ Manual box of gear shifting
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Replacement of the battery

At shutdown of the battery the radio equipment which is not production of AUDI demands input of a code. Therefore it is necessary to find out a code and to write down it. Otherwise the radio receiver can be switched on only by his manufacturer.

Not to lose the data which are written down on electronic media, it is possible to use the temporary battery of small capacity. It joins the lighter before shutdown of the battery according to the instruction of the manufacturer.



  1. Switch off electric consumers. Switch off ignition. Thus electronic devices will be protected from possible damages.
  2. Models with Telematik system: Activate service mode of the control unit of Telematik system since otherwise at shutdown of the battery the emergency Telematik battery is discharged. For this purpose enter sequence of the #4610# keys on a tube of management and confirm it with pressing of the Navi key.
  3. Uncover over a water-collecting compartment, address to the Section Removal and installation of a cover of a water-collecting compartment.

If the battery is only switched-off, but is not removed, it is necessary to displace a cover over the battery to the right and to remove it.

  1. Disconnect cables from the battery, at first a cable of the weight (1), then a positive cable (2).
  1. Unscrew the screw (4) plates of fastening (3) at the battery basis.
  2. If necessary, disconnect a hose of the central gas outlet from the battery.
  3. Extend the battery under a plate of fastening and take out it from a motive compartment.



  1. Before installation of the battery smooth out poles to gloss. The brush from a brass wire is suitable for this purpose.
  2. Install the battery into place, shift the battery basis under a plate of fastening and fix the moment 12nm.
  3. Before connection of the battery check that ignition and all electric consumers were switched off.
  4. Attach at first a positive cable to a positive pole (+), then a negative cable to a negative pole (-). Tighten nuts of fastening the moment 6nm.

Owing to wrong connection of the battery there can be serious damages of the generator and electric devices.

Do not grease battery poles.

  1. Establish a cover over a water-collecting compartment, address to the Section Removal and installation of a cover of a water-collecting compartment.
  2. If it is necessary, enter a radio receiver code.
  3. If it is necessary, again enter programs of the radio receiver.
  4. Establish hours.
  5. Models with Telematik system: Deactivate service mode of the Telematik control unit. For this purpose press a Navi-key on a tube of management.