1) Automatic level adjustment. The sensors on the front/rear allow the car to determine the suspension level, for example if you have put a couple of dead bodies in the boot, the rear will be lower than the front, the sensors tell the 'level adjustment controller' these values and the controller adjusts the headlight beam, using the motors, on
The Light sensor is in the bas of the mirror you can see the photocell from outside the car look at where the mirror mounts. The rain sensor is also located here. 1991 Toyota Corolla SR5 --- 2002 VW GTI 1.8T --- 2003 Audi A4 3.0 --- 2009 VW CC Sport --- 2010 Jeep Wrangler Unlimited Rubicon --- 2006 Mini Cooper --- 2012 Kia Optima SX --- 2004 XeJ1eS.