fobs are good for 100'?? I wish mine was.
I've always had to be within about 20' of the car ('17 Golf, non-kessy) for the unlock to work. It would be nice to have a longer range when trying to find the car at night in a parking lot. I assumed the short range when unlocking was some kind of safety related thing. The locking function seems to have a longer range, although I haven't measured it.
I had to replace the fob battery yesterday. The original lasted about 18 months.