Conversion hasn't been done fully !
You need to change the windscreen washer bottle and pumps for the 2006 onwards high pressure type
Also there are some wiring modifications rewired to get it to work properly.
Auto levelling won't ever work as the later facelift lights can bus signal cables aren't comparable with the earlier L322 electrics
Technically you don't need the self levelling as the car has self levelling air suspension
Good luck