Headlight beam height adjustment system — description (Mercedes-Benz C-Class W201)

The headlights are equipped with a beam height adjustment system to provide the ability to adjust the beam height from inside the cabin to suit the vehicle load.

The system is vacuum driven by the vacuum in the intake manifold and a beater in the vacuum reservoir located below the left wheel arch.

The system includes a three-position switch located next to the headlight switch on the instrument panel. According to the switch position, the vacuum in the adjustment unit is adjusted. The adjustment unit consists of a diaphragm, which is connected to the movable lens of the headlight by means of a rod having a stroke of approximately 3.0 mm. The vacuum created in the diaphragm causes it to deflect, which in turn moves the rod to raise or lower the beam of light from the headlights.

Apart from periodic checking of the vacuum hoses, the system does not require any adjustments or maintenance.

[Text republished from the website mercedesman.ru]