How to diagnose engine failure on Audi A4?

I've been experiencing frequent engine failures on my Audi A4 and it's becoming a major inconvenience. Are there any specific diagnostic steps I can take to pinpoint the issue and avoid future failures?

Firstly, make sure to check all your engine fluids and levels, as these can often be the cause of engine failures. If everything is at the proper levels, try using an OBD-II scanner to retrieve any trouble codes and narrow down the issue.

It may also be helpful to visually inspect your engine for any obvious signs of damage or wear. Look for cracks, leaks, or loose connections that could be affecting your engine's performance.