my remote for our Audi worked fine for 6-9 months then wouldn't...I replaced the batteries and it worked fine for a month and then died. I've come to believe it doesn't like my pocket with 10 other keys and the ring...probably pushes on the switches. Too many pushes outside the range of the car and the remote at least on the Audi becomes disconnected.

The audi resets itself to the car by pushing the unlock button (or lock, I forget which) and then unlocking the driver's door with the key within two minutes. Simple enough, and even intuitive. The posted volvo method sounds like it was invented by Rasputin the Mad Monk of Trollhattan.