What is the most important feature to consider when buying a BMW M9?

I am looking to purchase a BMW M9 and I am wondering what the most important feature to consider is. Can you offer any advice?

When it comes to a high-performance car like the BMW M9, the most important feature to consider is the engine. Specifically, the type of engine and its capabilities. Make sure to thoroughly research the different engine options available for the M9 before making your purchase.

While the engine is important, don't overlook the suspension system. A good suspension can make all the difference in handling and performance. Make sure to test drive the M9 and pay attention to how it feels and handles on different road conditions.

As a BMW enthusiast, I have to say that the interior design and features are just as important as the performance. Don't overlook things like the quality of materials used and the advanced technology features.