If Dot needs to nip into a shop ("I'll just be a few minutes") I stay in the car with the dogs for the half an hour or so that her few minutes usually takes
When it comes to full on shopping trips we usually leave the dogs at home unless we're going to Costco which has a nice wooded area alongside the car park, fenced and well away from the road, where they can have a run about. Dot shops while I give the dogs a bit of exercise …Perfect
The procedure for disabling the internal sensors in my Volvo V70 is a bit of a pain in the posterior as well and, as I can never remember it, I have it written down and fixed behind the sun visor
When we bought Dot's Honda Jazz we didn't specify the internal alarm so don't have problems with having to disable it.
We try never to leave the dogs in either car though as "Just a few minutes" can often stretch to ten minutes, twenty minutes or more and it's better, in my opinion, to get into the habit of not leaving them in the car at all.
When they're in Dot's car they're both on the back seat with harnesses that fit into the seat belt sockets and, in the Volvo, they're in a car crate each in the cargo area fastened down to the load attachment points provided.
Bob.