| Check | ||
Warning | 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. | |
Danger | Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC) | Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines. | |
Danger | Risk of explosion/risk of fire caused by highly flammable materials in the vicinity of damaged xenon bulbs. Risk of injury caused by UV light, hot components on xenon headlamps and glass splinters produced by bursting xenon bulbs. Risk of poisoning caused by inhalation of mercury vapors and by swallowing of/skin contact with toxic salts and mercury compounds. | Do not touch parts conducting high voltage. Persons with active electronic implants (e.g. cardiac pacemakers) must never work on xenon headlamps. Switch off the entire lighting system. Wear insulated safety shoes, safety glasses and protective gloves. Remove highly inflammable materials from the danger zone. Ensure sufficient ventilation in the working area. | |
1 | Check tire pressure, correct if necessary | ||
2 | Park vehicle on horizontal, level surface | Vehicle must be in curb condition (curb weight, fuel tank full or corresponding additional weight). | |
3 | Have person sit on driver seat or place load of 75 kg on seat | Vehicles except code 494 (USA version), except code 489 AIRMATIC (Air suspension with level adjustment and ADS adaptive damping system) | |
4 | Let engine run at moderate engine speed for approx. 30 s and actuate switch for level control | The vehicle height must then be at normal level. Move vehicle forward and backward to enable axles to be corrected. | |
5 | Prepare headlamp aimer | Align headlamp aimer approx. 50 cm in front of headlamps parallel to vehicle at height of light source. Adjust specified headlamp inclination on scale of headlamp aimer. | |
Commercially available devices/tools: | |||
6 | Start engine and switch on low beam | ||
7.1 | Check function of headlamp range adjustment by adjusting headlamp range adjustment switch | Vehicles except code 494 (USA version), except code 614 (Bi-xenon headlamps) | |
The light beams from both headlamps should adjust uniformly. | |||
7.2 | Check headlamp range adjustment for proper operation through placement of additional weights in the luggage compartment | Vehicles with code 494 (USA version), with code 614 (Bi-xenon headlamps) | |
The height of the light-dark boundary shall not change when loading or unloading the weights. | |||
8.1 | Set switch of headlamp range control on exterior lights switch (S1) to position 0 | Vehicles except code 494 (USA version), except code 614 (Bi-xenon headlamps) | |
8.2 | Remove additional weights from the luggage compartment | Vehicles with code 494 (USA version), with code 614 (Bi-xenon headlamps) | |
9 | Check low beam, correct adjustment if necessary | ||
Vehicles with code 614 (Bi-xenon headlamps) or vehicles with code 494 (USA version), correct setting subject to separate repair order. | |||
10 | Check setting of high beam | ||
Vehicles with code 614 (Bi-xenon headlamps) or vehicles with code 494 (USA version), correct setting subject to separate repair order. | |||
11 | Check fog light, correct adjustment if necessary | ||
12 | Switch off light and turn off engine |