How to

How to replace a light level sensor

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Here we’re looking at how to replace a light level sensor on a vehicle, using a Mercedes Vito as an example. This is a vehicle with LED lights fitted: to operate correctly, they need to be able to adjust their level.

Matt, our Delphi expert, walks you through the replacement process in full, showing you:

How to remove the broken sensor
Checking part numbers when it’s removed to get the right replacement
Attaching the new sensor
Calibration of the new level sensor

Sensors Vehicle Electronics & Engine Management How to Distributors DIYers Drivers Shop Owners Technicians

How does a light level sensor work?

A sensor is connected to the suspension arm of this vehicle. As the suspension moves up and down on the road, it will also move the sensor lever. This then reports to the headlights, and automatically adjusts the headlights to avoid dazzling oncoming drivers.

Why do new light level sensors need to be calibrated?

They need to be calibrated to ensure the lights are pointing in the correct direction from the headlights.

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