Another classic sad Euro story:
"I got a great deal on this hot rod Mercedes, but now I want to sell it ASAP because it's turning into a GIANT MONEY PIT!!"
It doesn't even have 100k miles on the clock...

Check Engine Light (aka MONEY LIGHT) is ON, setting a strange code:
P2097 - "Bank 1 Post-Catalyst Fuel Trim Too Rich"...
But it looks like the entire engine is running LEAN?? Hmmmm...

This Twin-Turbo GDI German beast has a lot of variables and is not going to be easy to diagnose...
Where do we begin?

THINKTOOL PROS:
https://www.amazon.com/dp/B08XXWHQVJ?...

Enjoy!
Ivan