Fog/Driving Lamp: Adjustments
03 - Service Procedures
Headlamps, Checking and Adjusting
• Halogen Headlamps, Adjusting
• HID Headlamps, Adjusting in Guided Functions
• HID Headlamps, Adjusting in Vehicle OBD
• Fog Lamps and Other Auxiliary Headlamps, Adjusting
Headlamps, Checking Adjustment
Special tools, testers and auxiliary items required
• Head light adjusting unit (VAS 5046) or
• Headlight adjuster (VAS 5047)
• Vehicle Diagnosis, Testing and Information System ( VAS 5051 A)
• Diagnostic cable (VAS 5051/6A)
Test - and adjustment requirements:
• Tire pressure must be OK.
• Lenses must not be damaged or dirty.
• Reflectors and bulbs OK.
• Vehicle must be properly loaded.
The vehicle must either have a person or 165 lbs (75 kg) of weight on the driver seat, and it must not be loaded with any other weight.
The curb weight is the weight of the vehicle ready to be operated with filled fuel tank (at least 90% filled), including the weight of all equipment usually carried in the car such as spare wheel, tools, car jack, fire extinguisher, etc.
If the fuel tank is not at least 90% full, adjust the weight as follows:
- Read fuel level from fuel gauge. Calculate additional weight needed using the following table. Place extra weight in luggage compartment.
Tank filling table
Example:
If the fuel tank is half full, place a weight of 44 lbs (20kg) in the luggage compartment.
• For additional weight use containers filled with water. A container filled with 5 liters of water weighs approx. 12 lbs (5kg).
Move vehicle back and forth for 1 meter (3 to 4 feet) or bounce front and rear of vehicle several times up and down to settle suspension.
• Vehicle and headlamp adjuster must be on a level surface. Refer to Operating instructions of headlight adjuster (VAS 5047) or headlight adjuster (VAS 5046)
• Vehicle and headlamp adjuster must be aligned.
• Inclination must be set.
In the trim above the headlamp, inclination measurements are stamped in "%". The headlamp must be adjusted according to these measurements. Percentage information is based on a projection distance of 10 meters. For example: inclination of 1.0 % converts to approximately 10 cm.
• The headlamp range adjuster thumb wheel must be in basic setting - 0 -.
Checking headlamps
Please check the following:
- With the low beam switched on check whether the horizontal light-dark border of the setting line - 1 - contacts the test surface.
- Check whether the break-away point - 2 - between the left horizontal part and the rising part on the right of the light-dark border runs vertically through the center point - 3 -. The bright core of the light beam must be on the right of the vertical line.
• To make it easier to find break-away point - 2 - cover and uncover left half of headlight (as viewed when looking forward) a few times. Then check low beam again.
• After correct adjustment of low beams the center point of the main beam must lie on the center mark - 3 -.
• For the previous test screens with 15° setting line, adjust for new test screen. To avoid incorrect settings, ignore 15° setting line.
Fog lamps
- Check whether the upper light-dark border touches the setting line horizontally over the complete test screen width.
Other additional headlamps:
Accessory auxiliary headlamp systems must be checked and adjusted according to the guidelines valid for them.
Halogen Headlamps, Adjusting
Adjusting left headlamp:
A Height adjustment
B Lateral adjustment
Adjusting right headlamp:
A Height adjustment
B Lateral adjustment
- Using a hex socket wrench or a suitable Phillips-head screwdriver, screw adjustment screws for lateral adjustment - B - and height adjustment - A - until the correct setting has been obtained.
HID Headlamps, Adjusting in Guided Functions
Test requirement for gas discharge lamps with dynamic headlight range control:
• For vehicles with gas discharge headlights, DTC memory should be checked and erased using Vehicle Diagnosis, Testing and Information System (VAS 5051 A) and headlight range control brought into Basic Setting before every headlight adjustment.
Adjusting headlamps:
- Connect Vehicle Diagnosis, Testing and Information System (VAS 5051 A).
- Select operating mode "Guided Functions" - arrow - on the display of diagnostic tester.
- Then perform vehicle identification on diagnostic tester.
- Press "Automatic headlight range control".
- Press "right light control".
- Press "Perform Basic Setting".
- Press "Continue".
- Perform test according to instructions of "Guided Functions ".
- Check headlight adjustment and adjust headlights if necessary.
End Adaptation
Indicated on display:
- Press the Go to button - arrow -on display.
Indicated on display:
- Press Exit button - arrow -on display.
- Turn off ignition and disconnect diagnostic connection.
HID Headlamps, Adjusting in Vehicle OBD
- Connect Vehicle Diagnosis, Testing and Information System (VAS 5051 A).
Display on (VAS 5051):
- On the display, press the button for "Vehicle On-Board Diagnostics " - arrow -.
Display on (VAS 5051):
- In selection - 1 -, click on the diagnostic function " Automatic headlight range control".
Display on (VAS 5051):
This Image Is Used For Illustration Purposes Only.:
- Input numbers "2 and 9" in button field - arrow - for "left light control" and press Q to confirm input.
This Image Is Used For Illustration Purposes Only.:
- Input numbers "0 and 4" in button field - arrow - for "Basic Setting" and press Q to confirm input.
- Input numbers "0, 0, 1" in button field - arrow - for "Display group number" and press Q to confirm input.
This Image Is Used For Illustration Purposes Only.:
- Press > button ("Continue") -item 1- on display.
The headlamps move into adjustment position.
- Perform test according to instructions of "Guided Functions ".
- Check headlamp adjustment and adjust headlights if necessary.
- Press > button ("Continue") on display.
End Adaptation
Indicated on display:
- Press the Go to button - arrow -on display.
Indicated on display:
- Press Exit button - arrow -on display.
- Turn off ignition and disconnect diagnostic connection.
Fog Lamps and Other Auxiliary Headlamps, Adjusting
Adjusting fog lights in headlamps:
• The adjustment of fog lights is performed automatically when adjusting headlamps.
Left fog lamp in bumper:
• There are two different versions of fog lamps.
• In version 1, adjustment is performed from the front,.
• In version 2, adjustment is performed at adjuster located in rear area of headlight.
Version 1
Adjusting screw on right fog lamp is arranged symmetrically.
- Turn adjusting screw - arrow - to correct beam height. Lateral adjustment is not possible.
Version 2
Adjuster is located on rear side of fog lamp - arrow A - and can be adjusted using a hex socket - B -.
Adjustment is performed using a hex socket - A - to rotate adjuster - B -.
Lateral adjustment is not possible.
Other auxiliary lamps
Accessory auxiliary lamps must be checked and adjusted according to the guidelines valid for them.