Check, adjust low beams

AP82.10-P-8263W

Check, adjust low beams

20.08.2015

Model

205, 253

with code 641 (Headlamps, LED, dynamic, left-side traffic)

except code 460 (Canada version)

except code 494 (US version)

except code 620 (Halogen headlamps with integral LED daytime running lamps)

except code 631 (Static LED headlamps, left-hand traffic)

except code 632 (Headlamps, LED, static, right-side traffic)

except code 640 (High-performance LED)

Model

205, 253

with code 642 (Headlamps, LED, dynamic, right-side traffic)

except code 460 (Canada version)

except code 494 (US version)

except code 620 (Halogen headlamps with integral LED daytime running lamps)

except code 631 (Static LED headlamps, left-hand traffic)

except code 632 (Headlamps, LED, static, right-side traffic)

except code 640 (High-performance LED)

Shown in model 205

01

Headlamp aimer

A

Distance

Dynamic LED headlamp, ECE version, shown in model 205

E1

Left front lamp unit

E1e1

Left high beam

E1e15

Left low beam (short range)

E1e15

Left low beam (long range)

Light gradient for low beams

1

Light-dark boundary

2

Reference line for height adjustment

3

Central mark

4

Reference line for lateral setting

Shown in model 205

H

Height adjusting screw

S

Side position adjusting screw

Shown in model 253

H

Height adjusting screw

S

Side position adjusting screw

Light gradient for diagnostic light pattern

1

Light-dark boundary

2

Reference line for height adjustment

3

Central mark

 Danger !

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A



General information on checking/correcting headlamp adjustment

AH82.10-P-1000-01A

Preparatory tasks

1

Determine degree of inclination for main headlamps



Notes on determining headlamp aiming values

AH82.10-P-1005-01A

 The degree of inclination for the main headlamps is specified on the model plate on the B-pillar on the passenger side.

2

Park the vehicle on a horizontal, level surface

 Maximum permissible height difference of surface for:
Vehicle: 1 mm/m,
Headlamp aimer (01): 0.5 mm/m.

3

Prepare vehicle for checking/correcting headlamp adjustment

AP82.10-P-8260-10C

4

Align headlamp aimer (01)

 Align the headlamp aimer (01) at a distance (A) of approx. 30 cm in front of the left or right front lamp unit (E1) level with the left or right low beam headlamp (long range) (E1e16) parallel to the front of the vehicle.
Other country-specific regulations or specifications in the operating instructions from the headlamp aiming device manufacturer must be observed accordingly.

5

Set specified degree of inclination for main headlamps at headlamp aimer (01)

6

Switch on low beam at exterior lights switch

 When testing and adjusting the low beams, make sure that the extended fog light function is not active.

Check and, if necessary, adjust (checking and adjustment of the low beams is described at the left low beam headlamp (long range) (E1e16); the same procedure is used for the right side.)

7.1

Check height adjustment of left low beam headlamp (long range) (E1e16); adjust if necessary

For vehicle with steel suspension on front and rear axle.

 If for a low beam light gradient the height adjustment is correct, the light-dark boundary (1) of the light gradient for the left low beam headlamp (long range) (E1e16) to the left of the center mark (3) must be congruent with the reference line for the height adjustment (2) in the headlamp aimer (01), as shown in the colored image. The colored area of the light-dark boundary (1) of the left low beam headlamp (long range) (E1e16) must be above the reference line for the height adjustment (2), as shown in the color image.

If the height adjustment of the left low beam headlamp (long range) (E1e16) is not correct:



Adjust zero position using diagnostic system in headlamp control unit.

Diagnosis  Control units view  Setup  SG­SW left headlamp  Adaptations  Zero position adjustment.



AD00.00-P-2000-04B



Prepare alignment of headlamp aimer (01).

AP82.10-P-8260-09HA



Switch on rectangular diagnostic light pattern using diagnostic system.

Diagnosis  Control units view  Setup  SG­SW left headlamp  Adaptations  Adjusting headlamps using diagnosis.



AD00.00-P-2000-04B



When the diagnostic light pattern is switched on and the height adjustment is correct, the horizontal light-dark boundary (1) of the left low beam headlamp (long range) (E1e16) to the left of the center mark (3) must be congruent with the reference line for the height adjustment (2) in the headlamp aimer (01). The colored area of the light-dark boundary (1) of the left low beam headlamp (long range) (E1e16) must be above the reference line for the height adjustment (2).

If the height adjustment of the left low beam headlamp (long range) (E1e16) is not correct with the diagnostic light pattern switched on:



Turn the adjustment screw for the height adjustment (H) to correct the height adjustment of the left low beam headlamp (long range) (E1e16).

7.2

Check height adjustment of left low beam headlamp (long range) (E1e16); adjust if necessary

For vehicle with level control on front and rear axle.

 If for a low beam light gradient the height adjustment is correct, the light-dark boundary (1) of the light gradient for the left low beam headlamp (long range) (E1e16) to the left of the center mark (3) must be congruent with the reference line for the height adjustment (2) in the headlamp aimer (01), as shown in the colored image. The colored area of the light-dark boundary (1) of the left low beam headlamp (long range) (E1e16) must be above the reference line for the height adjustment (2), as shown in the color image.

If the height adjustment of the left low beam headlamp (long range) (E1e16) is not correct:



Move to calibrated vehicle level.

Diagnosis  Control units view  Chassis  ADS - Adaptive Damping System  Actuations  Move to calibrated vehicle level and check headlamp adjustment again.



AD00.00-P-2000-04B



Headlamp adjustment incorrect:



Calibrate level in chassis control unit.

Diagnosis  Control units view  Chassis  ADS - Adaptive Damping System  Adaptations  Teach-in processes  Check level calibration and headlamp adjustment again.



AD00.00-P-2000-04B



Prepare alignment of headlamp aimer (01).

AP82.10-P-8260-09HA



Switch on rectangular diagnostic light pattern using diagnostic system.

Diagnosis  Control units view  Setup  SG­SW left headlamp  Adaptations  Adjusting headlamps using diagnosis.



AD00.00-P-2000-04B



When the diagnostic light pattern is switched on and the height adjustment is correct, the horizontal light-dark boundary (1) of the left low beam headlamp (long range) (E1e16) to the left of the center mark (3) must be congruent with the reference line for the height adjustment (2) in the headlamp aimer (01). The colored area of the light-dark boundary (1) of the left low beam headlamp (long range) (E1e16) must be above the reference line for the height adjustment (2).

If the height adjustment of the left low beam headlamp (long range) (E1e16) is not correct with the diagnostic light pattern switched on:



Turn the adjustment screw for the height adjustment (H) to correct the height adjustment of the left low beam headlamp (long range) (E1e16).

8.1

Check lateral adjustment of left low beam headlamp (long range) (E1e16); adjust if necessary

For vehicle with steel suspension on front and rear axle.

 If, for a low beam light gradient the lateral adjustment is correct, the light-dark boundary (1) of the light gradient for the left low beam headlamp (long range) (E1e16) starting at the center mark (3) on the right must be congruent with the reference line for the lateral adjustment (4) in the headlamp aimer (01), as shown on the color image. The colored area of the light-dark boundary (1) of the left low beam headlamp (long range) (E1e16) must be above the reference line for the lateral adjustment (4), as shown in the color image.
When the diagnostic light pattern is switched on and the lateral adjustment is correct, the vertical light-dark boundary (1) of the left low beam headlamp (long range) (E1e16) each starting at the center mark (3) must run upward at 900 to the reference line for the height adjustment (2) in the headlamp aimer (01). The colored area of the vertical light-dark boundary (1) of the left low beam headlamp (long range) (E1e16) must be to the left of the center mark (3).

If the lateral adjustment of the left low beam headlamp (long range) (E1e16) is not correct with the diagnostics light pattern already switched on:



Turn the adjustment screw for the lateral adjustment (S) to correct the lateral adjustment of the left low beam headlamp (long range) (E1e16).

If the lateral adjustment of the left low beam headlamp (long range) (E1e16) is not correct:



Adjust zero position using diagnostic system in headlamp control unit.

Diagnosis  Control units view  Setup  SG­SW left headlamp  Adaptations  Zero position adjustment.



AD00.00-P-2000-04B



Prepare alignment of headlamp aimer (01).

AP82.10-P-8260-09HA



Switch on rectangular diagnostic light pattern using diagnostic system.

Diagnosis  Control units view  Setup  SG­SW left headlamp  Adaptations  Adjusting headlamps using diagnosis.



AD00.00-P-2000-04B



Check the height adjustment of the left low beam headlamp (long range) (E1e16) again using the diagnostic light pattern switched on; if necessary, correct by turning the adjustment screw for the height adjustment (H).



Check the lateral adjustment of the left low beam headlamp (long range) (E1e16) with the diagnostic light pattern switched on; if necessary, correct by turning the adjustment screw for the lateral adjustment (S).

8.2

Check lateral adjustment of left low beam headlamp (long range) (E1e16); adjust if necessary

For vehicle with level control on front and rear axle.

 If, for a low beam light gradient the lateral adjustment is correct, the light-dark boundary (1) of the light gradient for the left low beam headlamp (long range) (E1e16) starting at the center mark (3) on the right must be congruent with the reference line for the lateral adjustment (4) in the headlamp aimer (01), as shown on the color image. The colored area of the light-dark boundary (1) of the left low beam headlamp (long range) (E1e16) must be above the reference line for the lateral adjustment (4), as shown in the color image.
When the diagnostic light pattern is switched on and the lateral adjustment is correct, the vertical light-dark boundary (1) of the left low beam headlamp (long range) (E1e16) each starting at the center mark (3) must run upward at 900 to the reference line for the height adjustment (2) in the headlamp aimer (01). The colored area of the vertical light-dark boundary (1) of the left low beam headlamp (long range) (E1e16) must be to the left of the center mark (3).

If the lateral adjustment of the left low beam headlamp (long range) (E1e16) is not correct with the diagnostics light pattern already switched on:



Turn the adjustment screw for the lateral adjustment (S) to correct the lateral adjustment of the left low beam headlamp (long range) (E1e16).

If the lateral adjustment of the left low beam headlamp (long range) (E1e16) is not correct:



Move to calibrated vehicle level.

Diagnosis  Control units view  Chassis  ADS - Adaptive Damping System  Actuations  Move to calibrated vehicle level and check headlamp adjustment again.



AD00.00-P-2000-04B

Headlamp adjustment incorrect:



Calibrate level in chassis control unit.

Diagnosis  Control units view  Chassis  ADS - Adaptive Damping System  Adaptations  Teach-in processes  Check level calibration and headlamp adjustment again.



AD00.00-P-2000-04B



Prepare alignment of headlamp aimer (01).

AP82.10-P-8260-09HA



Switch on rectangular diagnostic light pattern using diagnostic system.

Diagnosis  Control units view  Setup  SG­SW left headlamp  Adaptations  Adjusting headlamps using diagnosis.



AD00.00-P-2000-04B



Check the height adjustment of the left low beam headlamp (long range) (E1e16) again using the diagnostic light pattern switched on; if necessary, correct by turning the adjustment screw for the height adjustment (H).



Check the lateral adjustment of the left low beam headlamp (long range) (E1e16) with the diagnostic light pattern switched on; if necessary, correct by turning the adjustment screw for the lateral adjustment (S).

Concluding tasks

9

Reset switch positions to input condition

Only if the high beam setting is not to be checked afterwards.