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Call or Text Service: 847-371-1937


Business Hours

Monday thru Friday

9:00 am - 5:00 pm

Extended hours are available by appointment. (7am-10pm)+ some Saturdays-call for details


Servotronic II Variable Effort Power Steering

The Servotronic II variable effort power steering system uses the proven basic steering valve design and the same principles to vary the steering wheel effort, but incorporates several improvements in the feedback mechanism over the previous design. The basic valve is a rotary steering valve with a roller bearing encased in a steering box. The principles used to vary the steering wheel effort still include active hydraulic feedback from the feedback mechanism:

  • Valve resistance increases with vehicle speed. Therefore, the effort required to move the steering wheel is increased to enhance straight-line stability at higher speeds.
  • Power steering assist to the mechanism at the steering gear is not limited at high vehicle speeds.

    Extended CAN Data Bus System

    The new Audi A4 and A6 are equipped with a widely extended CAN data bus system. Due to the ever increasing number of control modules installed in the vehicle and the associated requirement for data exchange, the importance of the CAN data bus system increases significantly. For communication between the installed control modules and the diagnostic tester, two diagnosis wires (K and L) are available. The newly developed adapter VAS 6017A enables communication with all control modules.


    The compass and its control button are integrated into the inside rear view mirror housing. When the ignition switch is on, the direction of vehicle travel is displayed. For the most accurate readings, the compass must be calibrated and adjusted to match the compass set zone for the area in which the vehicle is operated.


    The compass is self-calibrating. It will display “C” until it calibrates itself during vehicle operation or is calibrated manually. The compass may require calibration if:

  • The vehicle has been involved in a collision or experiences a jarring force that is sufficient to disturb the inherent magnetic field of the vehicle.
  • The vehicle has been operated near a high magnetic field such as a car wash or overhead train.
  • The vehicle battery has been disconnected for a long period of time. The compass will eventually correct itself for these conditions during normal vehicle use. Manual calibration will speed the process.
  • Calibrating the Compass

    1. Turn the ignition switch to position II.
    The rearview mirror display should show
    the letter “C.”

    2. If “C” is not displayed, use a ballpoint
    pen or similar tool to press the button
    on the bottom of the mirror for about
    6 seconds until “C” is displayed, then
    release the button.

    3. Calibrate the compass by driving the
    vehicle in circles at a speed of 5 mph
    (8 km/h) or less until the mirror display
    shows a direction symbol (N, NE, etc.).
    Normally this will take about two circles.

    Compass Set Zones

    Variations in the earth’s magnetic field will cause changes in the compass readout when the vehicle is driven from one compass set zone to another. However, since the magnetic variation between adjacent zones is only 4 degrees, for most driving situations, resetting the compass should only be necessary if the vehicle has crossed more than one zone. The precise points at which the set zones change cannot be accurately plotted. Vehicles operated in an area where zones converge should not normally need to have the compass reset every time the vehicle crosses from one zone to another.

    Setting the Compass Zone

    1. Determine the appropriate compass
    set zone for your location from
    the illustration.
    2. Turn the ignition switch to position II.
    3. Using a ballpoint pen or similar tool, press
    and hold the button on the bottom of the
    rearview mirror for about 3 seconds until
    a zone number appears on the display,
    then release the button.
    4. Alternately press and release the button
    until the desired zone number appears.
    5. About 10 seconds after releasing the
    button, the directional display will appear,
    completing the zone setting process.

    The compass automatically
    defaults to zone 8.

    Bi-Xenon Headlights

    The headlight modules consist of the following components:

  • Ballast Unit for Gas-Discharge Headlight,
    Left J426; or Ballast Unit for
    Gas-Discharge Headlight, Right J427
  • Left Headlight Beam Adjusting Motor
    V48 or Right Headlight Beam Adjusting
    Motor V49.
  • Left High Beam Lamp L125 or Right High
    Beam Lamp L126 (normal H7 lamps).
  • High-Intensity Gas-Discharge Lamp L13.
  • Housing with laminated clear glass lens.

    Functional Principles


    High beam

    When the bi-xenon headlights are set to high beam, the entire light cone reflected from each High-Intensity Gas-Discharge Lamp L13 is effective. In addition, the Left High Beam Lamp L125 and Right High Beam Lamp L126 (normal H7 lamps) are turned on.

    Low beam

    When the bi-xenon headlights are set to low beam, an electro-magnetically actuated screen is moved into position in front of the reflector, to block out part of the light cone.

    Audi Telematics by OnStar

    Audi Telematics by OnStar is an in-vehicle communication system using cellular telephone, internet, and global positioning system (GPS) technologies to provide safety, security, and convenience services at the touch of a button. New services will be added as the technology advances and the market demands. Refer to the OnStar user’s instructions for details on features and their availability.

    GPS is an array of 24 satellites that orbit the earth and constantly broadcast radio signals. The OnStar Telephone/Telematic Control Module J526 in the vehicle receives the GPS data, decodes it, and transmits the vehicle location to the OnStar call center using cellular technology.

    Symphony II Radio Transport Mode

    New Audi vehicles equipped with Symphony II radios are shipped from the factory with their radios in transport mode. This reduces the parasitic voltage drain on vehicle batteries during shipping and storage. Normally, the Symphony II radio transport mode is deactivated during the new vehicle pre-delivery inspection process, prior to delivery of the vehicle to the customer. If the radio is in transport mode, pressing any radio button when the ignition switch is on will cause “TRANSPORT” to come up on the radio display.

    Deactivating Transport Mode

    The transport mode can be deactivated using the Vehicle Diagnosis, Test and Information System VAS 5051 and K-lead adapter VAS 6017A.

    Just call or text us and our friendly Service Consultant will answer any question you may have.

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    1272 Townline Rd.

    Mundelein, IL 60060

    Business Hours: Monday thru Friday 9:00 am - 5:00 pm CST

    Extended hours are available by appintment. (7am-10pm)

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