Why does my BMW M7 make a loud clicking noise when I start it?

I recently purchased a BMW M7 and every time I start the engine, it makes a loud clicking noise. What could be causing this and how can I fix it?

It's possible that there is an issue with the starter or the starter solenoid. I would recommend taking it to a certified BMW mechanic for a proper diagnosis and repair.

It could also be something as simple as a loose battery connection. I would suggest checking the connections and tightening them if necessary.