Xenon self levelling warning light

[wibly]

I bought the Santorin blue S8 from member smoothcoupe back in March having wanted one since seeing a group of them competing at Wiscombe hillclimb back in 2006 or 2007. Lovely car and I am slowly fixing some minor issues and cosmetics. Recently I had the front headlight level sensor arm come adrift triggering the warning light and giving the following fault codes from my OBDEleven :-

55 Headlight Regulation

System description: dynamische LWR D04
Software number: 4B0907357C
Coding: 00001

Trouble codes:
00776 - Left front level control system sensor Short circuit to B+
Intermittent
01533 - Terminal 56 (lights for headlights) Open circuit
static

I made up a replacement rod with some 6mm threaded rod and a couple of ball joints and tried to clear the fault codes, 0776 has gone but 01533 won't clear and the warning light is still on, a friend with full VCDS has tried to clear it and reset various things but the fault and light are still there. I've just checked back and 01533 was there back in July before the sensor problem.
The headlights all work and the levelling motors function if I test them with the OBDEleven, I've had the bulbs out (Osram D2R & generic H7s) and can't see any obvious wiring problems so am a bit stumped and need to get rid of the warning light to pass the MoT. I have read the various previous threads but couldn't find anything similar, has anyone had this fault code before and found a solution ?