Adam, FYI. I did the head, etc on my '89 300E at 165K. when I inspected the bores, I could still see the original crosshatching on the cylinder walls, with no ridge at the top. Pistons were a little carboned up from oil burning, but easily cleaned. Unless you are or were having problems with compression loss or blowby, your rings/pistons should be good to go. This has a lot to do with maintainance (read as frequent oil changes)..
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.