How can I troubleshoot the keyless start system in my Audi A5?

I am experiencing issues with my Audi A5's keyless start system. The car is not recognizing the key and I am unable to start the engine. What could be causing this problem and how can I fix it?

The most common cause of keyless start issues in Audi A5s is a weak battery in the key fob. Try replacing the battery and see if that resolves the issue. If not, it could be a problem with the car's receiver or the key itself.

Check for any obstructions near the antennas that may be preventing the car from recognizing the key. Additionally, make sure there are no other electronic devices near the key as they can interfere with the signal.

Sometimes, a simple reset of the key fob can fix the issue. Try pressing and holding the lock and unlock buttons simultaneously for 10 seconds. If this doesn't work, consult your Audi dealership for further assistance.