Poor guy brought a used AMG R63 Wagon from a non-certified MB dealer.
Turns out the engine has defective cylinder head bolts!
The end result is he suddenly starts misfiring and throwing CELs. Checks his oil and this is what he finds...
So he takes it to the dealer, who treats him very nice and gives him a nice loaner. Dude is thinking, “wow, this dealer is really nice to me, especially since I didn’t buy the car from them.” Then he gets the estimate.
And remember, when buying used DO YOUR HOMEWORK. This problem was well known. Don’t let this happen to you. Poor guy.