Headlamp, Adjusting, General Information
- The following test and adjustment description applies to all countries.
- However, national guidelines or regulations of the country must be observed.
Testing and Adjusting Conditions
- Tire pressure is OK.
- The headlamp glass must be clean and dry.
- The headlamp glass must not be damaged.
- Headlamp reflectors and bulbs are OK.
- Vehicles with matrix LED headlamps: only use the Headlight Adjusting Unit:VAS 621 001 for headlamp adjustment.
- The electro-mechanical parking brake must not be engaged so the vehicle is not under tension.
- The vehicle and headlamp adjusting unit must be on a level surface.
- Keep all doors and the rear lid closed for the duration of the testing/adjusting procedure.
- The headlamp must cool down to room temperature -- open the hood and touch the housing cover on the back of the headlamp.
Vehicles with air suspension:
- The air suspension pressure reservoir must be filled. Start the engine and let it run in the neutral for approximately two minutes.
Vehicles with coil springs:
- The vehicle must be under load.
Vehicle load on driver seat in otherwise unloaded vehicle (curb weight).
- One person or 75 kg (165.35 lbs).
The curb weight is the weight of the operational vehicle with a completely full fuel tank, including the weight of all equipment carried while in operation.
- Fuel tank, washer fluid reservoir, and SCR tank: at least 90% full.
- Equipment: for example, spare tire, tools, vehicle jack, fire extinguisher, etc.
If the fuel tank is not at least 90% full, the load must be prepared as follows.
-- Check the fuel tank fill level in the instrument cluster fuel gauge and compare it with the following table. Place additional weight in the luggage compartment, if necessary.
| Fuel Gauge | Additional Weight in kg |
|---|---|
| empty | 52 (114.64 lbs) |
| 1/4 | 39 (85.98 lbs) |
| 1/2 | 26 (57.32 lbs) |
| 3/4 | 13 (28.66 lbs) |
| full | 0 |
| Example: if the fuel tank is half full, an additional weight of 26 kg (57.32 lbs) must be placed in the luggage compartment. | |
TIP:
Use containers filled with water as additional weight (a five liter container filled with water weighs approximately 5 kg (11.02 lbs)).
Continuation for All Vehicles:
- The angle dimension -arrow- is stamped for ECE countries on the upper edge of the headlamp -1- in "%".
- The angle dimension for North America is generally 0.0% based on the "following" adjustment instructions.
TIP:
The percentage value is based on a 10 meter projection distance. An angle dimension of 1.0%, for example, converts to 10 cm (3.94 in.).
-- Pry out the cover -1- in the direction of -arrows-.