New Member & Auto Level inact

[Hisenberg]

Hello all,
I am a new member of this forum. I just purchased a 4.8 a month ago. Prior to that I had a 2008 M 5 and a 2007 M3 and was very pleased with both.
This is the first time I have owned a BMW that is out of warranty.
As much as I love the car, there are days where I think the purchase was a mistake. Primarily because the car is not currently covered under any warranty. Albeit there were no issues with the vehicle but today a message appeared on the display panel.
I have done search online and it appears the issue can vary anywhere from struts to airbags, sensors or simply fuse. Upon initial observation, there is no hissing sound heard or any change in suspension movement while starting or shutting off the vehicle. The ride is also normal. However, the car refuses to invert into lower or higher mode.
What do the pundits of this forum think?
Additionally, I am contemplating on purchasing a warranty. I am open to recommendations. Also, will the warranty be able to cover issues, if such arise?