Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Adaptive headlights: Introduction
Adaptive headlights turns the bi-xenon headlights towards the inside of a bend when cornering. This improves illumination of the curve of the road. Visibility is therefore improved.
When cornering, the driver is not looking into a "black hole" - instead, the adaptive headlights allow the driver to see the curve of the road.
- E60, E61, E63, E64 up to 03/2005:
- E60, E61, E63, E64 from 03/2005 until 09/2005NOTE: AHL control unit discontinued from 03/2005.
From 03/2005, the AHL control unit software is integrated into the light module on the E60, E61, E63, E64, E65 and E66. The AHL control unit is no longer fitted. - E60, E61, E63, E64 from 09/2005
The vehicle electrical system was changed from 09/2005.
As a result of the change, several control units were discontinued and some control unit functions were integrated into new control units.
- E70
The turning lights function is new on the E70 from the start of series production.
The turning lights give the area next to the roadway additional illumination when you are turning or cornering (driving in tight bends). They are also active when you park the vehicle.
Depending on the country concerned, the turning lights are activated when cornering.
- E81, E87, E90, E91, E92, E93
For the E81, E92, E93 from start of series production and for the E87 from 03/2007, the turning light function is new.
Turning lights are a subfunction of option 524 "Adaptive headlights".
Bi-xenon headlights are standard equipment on the E92, E93.
Option 524 is standard on the US version.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.