Halogen Headlamp, Adjusting

Checking and Adjusting Conditions

• Tire pressure OK
• The headlamp lens must be clean and dry.
• The headlamp lens may not be damaged.
• Headlamp reflectors and bulbs OK

With Steel Suspension:

• Vehicle load must be created.

Vehicle load on driver's seat in otherwise unloaded vehicle (curb weight).

• One person or 75 kg (165.34 lb)

The curb weight is the weight of the operational vehicle with completely full fuel tank, including the weight of all equipment carried in operation.

• Fuel tank: at least 90% full.
• Equipment: e.g. spare wheel, tools, vehicle jack, fire extinguisher, etc.

If the fuel tank is not at least 90% full, the load must be created as follows.

-- Check fuel tank fill lever in instrument cluster tank gauge and compare with the following table. Place additional weight in the luggage compartment, if necessary.

Fuel Gauge	Additional Weight
1/4	70 kg (154.32 lb)
1/2	45 kg (99.20 lb)
3/4	20 kg (44 lb)
full	0
Example: If the fuel tank is half full, an additional 45 kg (99.20 lb) must be placed in the luggage compartment.

With Air Suspension:

• The compressed air reservoir must be filled. Start the engine and let it run at idle for approximately 2 minutes.

All Vehicles:

• Roll the vehicle several yards or move it back and forth several times to seat the springs.
• The electromechanical parking brake must not be engaged so vehicle is not under stress.
• Vehicle and headlamp adjusting unit must be on a level surface.
• The headlamp adjusting unit must be aligned to the vehicle Headlamp adjusting unit instructions.
  Fig 1: Headlamp Adjuster Distance

  Courtesy of AUDI OF AMERICA, LLC
• The headlamp adjuster must be distance -a- 30 to 70 cm (11.8 to 27.55 inches) in front of the headlamp and should not deviate more than dimension -b- = 3 cm (1.18 inches) from the headlamp center point.
• The inclination dimension is set on the headlamp adjusting unit Headlamp adjusting unit operating instructions.
• The angle -arrow- is stamped on the top of the headlamp -1- in "%".
  Fig 2: Identifying Angle -Arrow- Stamped On Top Of Headlamp -1- In "%".

  Courtesy of AUDI OF AMERICA, LLC

Procedure

-- The vehicles must be standing on a flat surface.

-- Turn the headlamp switch to "low beam" - not "Auto".

-- Equipment version with manual headlamp range control: Set the range position thumbwheel to the "0" position.

Calibration Procedure

-- Equipment version with air suspension: To prepare for the headlamp adjustment, in "Guided Functions"  , select "basic setting" on the Vehicle Diagnostic Tester.

-- Select the Diagnostic  mode and start the diagnostics.

-- Select the tab test plan  .

-- Select select individual tests  and choose the following sequence.

• Body
• Electrical Equipment
• 01 - OBD-capable systems
• 55 - Dynamic headlamp range control - J431/J745
• 55 - Headlamp range control, functions
• 55 - Basic setting

-- Follow the instructions on the Vehicle Diagnosis Tester display.

-- During the program, you will be asked to perform a headlamp adjustment.

Headlamp Adjustment

• The horizontal light-dark border must touch the dividing line -1- on the adjusting unit test surface.
• The point -2- between the left horizontal part and the right vertical part of the light-dark border must run vertically through the central mark -3-. The bright core of the light beam must be to the right of the vertical.

-- To adjust the height of the headlamp, set the light-dark border just under the dividing line with the adjustment screw -1-.

-- Then adjust the light-dark border, starting from the bottom, on the dividing line.

-- For side adjustment, turn adjusting screw -2-.

-- Equipment version with air suspension: After the headlamp is adjusted, complete the "basic setting". Switch off the ignition and disconnect the diagnostic connector.