Just had to pull the inner tail gate liner off due to the tail gate not latching. I just opened it Up at work to put my bag in and when trying to shut it it wouldn't latch.
I ordered a new unit which is coming tomorrow at a cost of £45.00 including vat part number V5M0 827 505 E9 B9.

I thought i would try and fix it when I took it apart I noticed that the motor would not spin the gear properly due to the worm drive. When I removed the worm drive I noticed that it has snapped in two which is why is not locking as it should spin to release then return to the lock position by a spring as its shaft is broken it cannot. I might try and 3d print a replacement gear to see if I could fix the old one as spare if it works it would make a excellent repair kit for diy repairs as it would cost a few pence.