Just bought a Volvo V70! (advice wanted)

[mg123]

Hi all,

I've just bought my first car (!!). It's a 2000 Volvo V70 (Classic) 140bhp Petrol Manual.

It's had a full service history from the main dealership.

Really loving with the car--such a pleasure to be in! It will mainly be used for doing holidays in (camping/touring/road trips).

Everything works as it should other than that there are a couple of issues with the electric windows. Driver seat can operate all windows correctly, apart from passenger window (which it can bring down but not back up).
Passenger seat can operate its window fine.
Rear window child lock is on, and jammed in place. I've tried spaying wd-40 silicone on the buttons, but it still seems jammed and i don't want want to force it. So this means that the window buttons in the rear seats aren't working.
Does anyone know any potential solutions to the above? Preferably ones which don't involve taking the whole door off!

I live in London at the moment and it's not ULEZ, so might end up selling within a couple of years

As I mentioned above, the car's had an annual service with the main dealer, and I'm wondering about whether it makes sense to continue that, or to go for a service this year with an independent Volvo garage? Does anyone have any recommendations? I often take trips to the West Country and I'd had a recommendation for Kings Motors out that way.

Thanks for any help!