Electric seat problem

My tdi defender has front seats from a 2001 merc C32 AMG
All been wired in properly using the merc switches
All was well apart from the heated elements not working so I got some replacement carbon fibre pads and took the seat out to fit them, it's been out a few days and went to refit tonight and non if the functions work
Worst of all I left the seat right forward so I could get the rear bolts out so I now cant drive the car !!
Power is getting to the multiplug under the seat and I can feel the relays on the seat clicking but nothing
Any suggestions ?

Thanks