I don't know if it makes sense or not. I have been at the point of questioning throwing money at my car thinking "I have almost replaced everything, this last fix should do it" HA HA You just start over when everything has been done only once. Of course, you CAN do this if it is a Mercedes.

I have tried buying new cars and trying to make them daily drivers, but I always miss the MB when I am not driving it. So I keep going back.
You look to have plenty of good cars to drive, so your situation is different.

I have been driving a 6.9 for 10 years as a daily ride and no, I don't think that makes sense, but I have to ask myself, what is as much fun as this car when it's running right? I look at repairs as a car payment on something I really like. I have no doubts that this car will run for my lifetime if I keep maintaining it. And when something breaks, I fix it and it runs like a new car again. You can't have that with every other car out there.