S211 airmatic headlight level issues

[JWood3]

Hi all, looking for some help with my xenon headlights not levelling.
Both lights start up in their lowest position which is pretty useless.
I have a version of star and can see current and stored errors for 9002/9003 which are the modules on the lights themselves. I can also see data from the level sensors and perform the zero position adjustment. The lights can be commanded to low/mid/high positions so the motors and modules must be working to a point.
Has anyone had any experience with this before? There isn’t much on the web for a solution I don’t want to start throwing parts at it if it is just a comms. issue.

Thanks, James.

 

[AMGeed]

My previous W211 failed its MOT on the headlight aim being too low.
It was zeroed in using Star and readjusted.

 

[JWood3]

To close this thread off as there is nothing worse than searching for a problem and not getting closure….

As I mentioned I had no comms with the hra system for both lights. I could actuate the right one with star but would get an error after about 3 movements. I ordered a used hra module and swapped it with no difference. For those searching it is located under the seat and carpet on the drivers side (right).

I then replaced the aftermarket depo light on the left with a used oem Hella and it would be actuated but still a comms error. I noted that if I unplugged the levelling motor on the right then the error cleared on the left. I then swapped the levelling module on the base of the right headlight with no change.

The final fix was to also fit a used Hella on the right side. Bingo! All works.
I can only surmise that the cheap Depo lights can never work with the levelling systems of an S211. Stay away from these crappy headlights and all will be well. They also have a very different lens and beam pattern and lack the adjuster for European driving.