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Having finally wired up my retrofitted heated leather seats I thought I’d put some info on the forum so it may help others. I’d like to sincerely thank jackfrost & JohnnyType2 who offered great advice, helping a complete electrical novice to figure this out. To do the retrofit you will need: 1. Leather seat interior (eBay £300-£500). If like me you are changing a half leather vRS interior make sure you get all the trims if changing colour (I went from silver to red), i.e. hand break gaitor, leather armrest, gearstick and gaitor and steering wheel (although I’ve kept my silver stitched one). The front seats are heated and come with the wiring and 12-pin (female) plug. 2. Climatronic panel with heated seat switches (5E0907044N, eBay, £40-£50) 3. Wiring harness – Kufatec make a heated seat wiring harness for the Mk7 Golf (MQB platform, the same as the Mk3 Octavia), this is what I’ve used (£66.50 including postage from Richter Sport). The Kufatec harness comes with installation instructions of where to wire into the BCM/fuse box/earth. I cross checked with the Skoda wiring schematics having downloaded these from Erwin. 4. Male 12-pin connector plug (part number 7L0 972 762, AliExpress, about £18 for two). You could do this without the connector and just solder the wires together and heat shrink with plastic tubing. I wanted the option of easy disconnection of the seat wiring if needed in the future. 5. Standard piggyback fuse (eBay, approx £2.00) and 25a fuses (I used two). 6. OBDeleven or VCDS to code the seats to the car. You will also need some tools such as a wire stripper/crimping tool, snips, plastic trim removal tools, kneeler (if your knees are hammered, like mine), plasti-ties (to re-tie the wiring around the BCM plugs), de-pinning tools, multi-meter to check continuity of the wires in the harness once pins are changed over (see below). Procedure: Swap out the interior and give it a good clean. vRSAnt has a cracking guide on how to remove the seats: On the Golf Mk7 wiring harness, change the 8-pin VW plug over to the 12-pin Skoda so that the harness will connect to the seats. I managed to reuse the crimps from the AliExpress male socket and attach these to the Golf Mk7 harness. There’s a video on YouTube that explains how to do this (https://www.youtube.com/watch?v=OK7M4voWYOo) although I used small watchmaker flat head screwdrivers to prise out the neck of the crimps. Once the crimps were changed over, I checked continuity of each wire in the harness using a multi-meter. De-pin the redundant pins/wires on the AliExpress plug. There is an extra wire in the Golf Mk7 harness that connects from BCM plug A to the (SC) fuse box behind the glovebox. You need to cut the female connector off and join the cable to the piggyback fuse (crimp or crimp and solder) and use 2 x 25A fuses in the piggyback. Next you need to swap out the climatronic panel. Remove the radio fascia using removal keys (about £2 from eBay) and disconnect the radio, then remove the trim in front of the cimatronic panel and then the climatronic itself. Remove the wired connections, swap over and put the trim and radio back. Now you’re ready to connect up the wiring harness. Before starting I disconnected the negative of the battery. Remove both front seats, unscrew (10mm torx) four screws per seat, so that you can access the void under the carpet where the seat connections go. On the passenger side remove the trim along the door base, having first removed the bonnet release lever, and then remove the side panel on end of the dash (to the left of the glove box) and the glovebox. Doing so will allow you to get your hands in to the BCM plugs to remove them. See JohnnyType2’s comments in this thread: Remove all three plugs (A, B & C) from the BCM. You will need to connect wires & spades (male connector) to Plug A and C. The “extra” wire is connected from the BCM plug A to the fuse box (SC26 with 25a fuses). Once wired up, replace the plasti-ties around the neck of the BCM plugs and reinsert them into the BCM. Connect the earth to the earth point beneath the insulation at the door sill and run the cable along the existing harness and feed the male heated seat connector into the void beneath the seat and connect the male/female plugs. On the driver side; I initially just ran the wire over the centre console and connected the male & female heated seat plugs together to check all was ok. Now you can reconnect the battery and start the car. Clear all fault codes with OBDeleven or VCDS. Then go to 09 Central Electrics and under long coding look for the byte that mentions heated seats, select it and change to heated front seats and code/save. Unfortunately, I can’t recall the exact wording but it’s more or less as described; you are only changing one setting. The seats should now be working The wiring harness from the BCM to the driver’s side can be routed up behind the glovebox and the radio fascia (remove to access the void to the rear) and then run down behind the carpet at the pedals and along the door sill where the existing wiring is. Then earth to the earth point on the sill and connect the male/female heated seat plugs in the void beneath the seat. Replace all trim, glovebox and side panel and bask in the warmth of heated seats. Just in time for spring