VW Security puzzle

[Big_Dog]

I was earlier picking some stuff up from Argos and between putting the plastic boxes in the boot and walking to the pay machine and back (30 yards). A promising footballer had it on his toes with my sunglasses and £20 or so from my change. Car is keyless and no damage was done getting in. I assume by pressing the door button and walking away the door would be locked and even if I forgot it would lock itself. Any ideas? It's a Touareg.
I knew it was a mistake to go to Feltham without the dogs.

[ging84]

i'm not sure about the vw keyless system specifically, but normally if you have used the key or fob to unlock the car and open a door, it will not then auto lock, if it did it would be a pain in the ass

[Pontoneer]

Argos let you load goods into your car before you paid for them ?

Usually they don't even fetch it until you've paid .

[Mr Happy]

Possibly had a RF jammer in his pocket, waited for someone to do like you did (just expect the button press to work) and voila, you walked away from an open car - he goes up, opens it, rifles it and is away.