they never made any for the B7
Sorry to correct you but the did have them as my saloon has them. They were i beleive £30 option from factory. All it is when you open the boot of the key the lid goes up automatically.
Bad picture but you can kind of see the spring etc (the gas strut was removed but you can see the ball hinge it connects too, this was when i had the problem were all the electrics failed in the bootlid)