There are 2 model numbers Ian, the second one is effectively from 219 on...
and no 'clocking' ... IIRC the milage is stored in the Lighting Module and I believe T4 is required to transfer the milage, if this isn't done I belive the milometer dosent work after a few miles...
#I wait to be corrected but I belive thats the score...
Mine will only be fitted if I screw up my 'Led project'
NIck