Now that's a strange post. Clip, "MANY drivers of these cars understand economic decision-making. Often it doesn't make sense to proceed with a repair item that can cost $3K to (sometimes) close to $5K on a car that's 12-15 years old.
"
Paragraph one pretty much says that you are stupid to put 3-5K in a 12-15 year old car. Note, W140 for instance produced until 1999, now 7 years old.
Smarter to dump the car and start over even though the car is in perfect shape?

I don't know what paragraph two means.

Finally, Matt says he will replace his if it fails? Guess he doesn't understand economic decision making!

Sorry, I just don't get it.

Steve