Although an automotive purist, I wish I'd of kept the pricelist window stickers AND owners manuals from all the cars I've owned. Especially the window pricelist sticker from my '83 300SD and it's owners manual. The worthless, ungrateful doofus that bought the car from me when I bought a new MB diesel 12 years ago, could not have cared less about how he was going to treat the SD after acquiring it from me.
