Great info in this thread but I have two questions
- where is the ride height sensor(s) located ?
- easiest way to know if your car has adaptive headlights ?

 

@myexcursion
According to the owner's manual, the lights, ALFS module, is fed speed and steering angle inputs which cause the lights to sweep in the direction of a bend in the road to provide better lighting. No mention of self leveling. But, the service manual also mentions a level sensor that appears to be attached to a rear upper control arm.
Easiest way to tell is turn to the lights on in a dark area or garage or start the car if the lights are in Auto. You should see the lights move - sweep or dance as I call it. Happens every time the lights come on if you have the feature. Just something else to break IMO. And they appear to.

 

My kid's 2007 XKR had the level sensor on the front-right suspension. It got twisted around weirdly and needed to be straightened, then all was well.

 

Certainly makes more sense to be at the front, but wouldn't surprise me if Jaguar WIFi'ed it from the rear. Every time I try to post an image from the manual showing it at the rear, this website crashes whatever browser I'm trying to use. Shuts down Firefox and Brave. Just look for headlights in the service manual.

 

Is dis it?

 

Okay, yeah, my terminology was wrong. Kid's 2007 only had the front one that I noticed, and it was all bent up. I didn't look for a rear one since bending the front bracket fixed everything.

 

I suspect a headlamp levelling sensor needs to be at the rear of the car since its function is compensate for a heavily-laden trunk making the back end go down. If the back end goes down the headlamps point upwards more, which dazzles other drivers.

 

Makes sense to me.

 

As the Workshop manual stated in post #92, front and rear vehicle height sensors.
Need them both to determine the angle of the car.

 

Luv2fly, Assuming an owner has automatic self aiming lights, there is a level sensor in the front, on the right, and one in the back. Look closely at the right front suspension. If it's not there, someone took it off. If it's not working, your lights will not complete their reset function. They get screwed up when the suspension assy stretches down, perhaps by, for example, replacing a strut. The the (using the tem loosely) mechanic pushes up the suspension and the sensor arm gets bent backwards, or the arm gets ripped off.

 

@panthera999

Thanks. My lights work fine. I was just trying to answer questions from @justinhill and @myexcursion about how they worked and how to know if you had them.

 

Workshop manual on the external HID lighting system is a very good read.