Ok, so our i10 has gone, but had we kept it, I had already made up my mind that after the 3rd year paid up service we bought at point of sale, it wasn't going back to the dealership because the servicing costs are, in my opinion, horrendous for such a small car.
As for having a full dealership service history, well that doesn't always have the desired effect either as we found out when we chopped our i10 in for the Vitara. The Suzuki dealership, which is part of a large multi-marque operation saw we were handing over a very well looked after, just 3rd serviced and MoT'd car fitted with new discs and pads all round, and promptly offered us less than Webuyanycar.com. Thankfully, I was forearmed with the guaranteed cash price from WBAC and in order for Suzuki to sell us the car we wanted, they had little option but to match it with a bit extra on the top. I could have got a lot more for the car if I had sold it privately, but I just cannot be bothered with private buyers phoning up at all hours, tyre kicking and then wanting the car for even less than you'd get PXing it.
Regarding the aircon, yeah something that dealerships seem to be pushing in a big way, even moreso now that the newer cars are using the new HFO-1234yf
refrigerant, a big moneyspinner for them. Our Vitara uses the newer aircon gas. As far as I'm concerned, as long as it gets cold, it won't be getting 'serviced'. Our car aircon is set to come on automatically anyway, so it's used every single day, so no chance of the seals drying out. And no, it doesn't affect the mpg that much using it.
Anyway, I've got 'er indoors trained enough now not to agree to anything 'extra' being done to the car should she get one of those desperate phone calls from the dealer. Since we've had the Vitara, she's had at least 3 phone calls from the dealership HQ asking her if she wants to buy GAP insurance. I was present when she took the last phone call and she dealt with the idiot on the end of the phone in a very robust manner lol! She's not had another call since!
One final part regarding dealership servicing concerning warranty and recalls. Obviously you don't have to have a franchised dealership service the car to keep it in warranty, as long as the garage you use are VAT registered and use genuine parts, then EU Block Exemption rules apply. With regard to actual recalls, easy enough to check: https://www.gov.uk/check-vehicle-recall
Obviously my comments above are very UK centric, I cannot speak for markets outside of the UK.