I have an audi A4 1999 and few days ago my key fob died. I replaced the batteries and followed various howtos about how to reprogram it, but nothing seems to work. Also, if shaken it does a weird sound, so I assume something is broken. Unfortunately, I do not have any spare keys (the car is used and the old owner lost it).

If I enter in my car using the key, the alarm goes off and I can't use my car.

What can I do? Is there a way to use my car without having the key fob replaced and just by using the regular key?