Just looking through this whole thread I think you need to re-evaluate what you REALLY want out of the car and perhaps adjust your expectations, particuarly when it comes to optional extras. If you're looking at getting the 245 model you may need to up your budget a little. For example, there's none on Autotrader for less than 16k, you're also going to really struggle to get into a car with the virtual cockpit if 15-16k is your limit.
No electic seats really isn't the end of the world, in fact after using the electric seats in the wife's Tiguan I'd rather not have them. They take far too long to adjust and I honestly can't see what all the fuss is about when I can adjust the seat manually way quicker! Heated seats is an option I'd always take over electrically operated.
I'd also be wary of PCP when you can get loans at such a cheap rate at the moment. For £269 you can get £15k over 5 years and the car is yours at the end of it.