Yes, read the instructions, moved slider to correct position, but once original auxiliary's were attached, I just couldn't get it anywhere close. In the end I had to pack the lower fixing bracket out with a spacer to get it somewhere near, but even that was still too low and wasn't 100% happy with it. It passed the test last year, but maybe the new reg's which came in this year didn't cut it? Maybe it was the tester's bad day? Knowing I wasn't entirely happy with it, I acquired a replacement Hella unit last year..... and am glad I had it to hand to fit today. No adjustment required - spot on, even if it's not as crystal clear as the brand new one.