BMW ONBOARD COMPUTER Bedienungsanleitung PDF herunterladen (Seite 34)

E46 Driver Information

HEADLIGHT BEAM THROW CONTROL- LWR

OVERVIEW

LWR automatically adjusts the vertical positioning of the headlights to maintain optimum

headlight beam positioning for maximum driving visibility and to prevent undue glare for

oncoming motorists. The system compensates for vehicle load angle changes (ie: dimin-

ishing reserve of gasoline in fuel tank during a long journey, overloaded cargo weight, etc.)

LWR has been available on BMW vehicles in other markets for quite some time. Starting

with the 1999 model year all US market vehicles with Xenon Lights incorporate LWR as

standard equipment. LWR is not available with standard halogen headlights.

LWR monitors the vehicle’s loaded angle via two hall effect sensors mounted to the front

and rear suspension members. When an adjustment is necessary, LWR simultaneously

activates two stepper motors (one in each headlight assembly).

The stepper motors drive a threaded rod that moves the lower edge of the headlight carri-

er plate forward and backward (depending on driven direction). The upper edge of the

headlight carrier plate is fixed on a pivot. The pivoting movement adjusts the vertical posi-

tion of the headlight beam.

Note: LWR is identified in the Diagnosis Program as LRA.

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BMW ONBOARD COMPUTER Bedienungsanleitung Seite 34