The service you provide for us Mercedes addicts is invaluable. I had a 76 240D that I took to 325K (126K that I put on). Had I had some of your maintenance and tuning guides and kits, I might have taken it to 400 or even 500K. In the past six months I purchased two 300D turbos, an 82 I bought and am fixing up for my daughter and a 83 I bought for parts, but am beginning to fix up for myself. The knowledge you have given me to fix it myself, makes the repairs affordable. I also gained confidence to take these cars to 300K and beyond. I deeply appreciate you sharing this invaluable knowledge you share with Mercedes enthusiasts like me. Thanks again for this newest instruction booklet. - Owen