Your Manuals have Returned me to being able to work on my own Cars

First of all, Thanks for all you do, Bought 3 manuals off Ebay. I am so impressed with the 1978 300 D we purchased in September 2002 , I have not rested until I sold my Eagle Talon , and bought another 300 D for a daily driver, I drive 2-300 miles per day across southern Utah and eastern Nevada, Your manuals and Mercedes craftsmanship have returned me to the first sense of security in 25 years of being able to work on my own cars, and know they will be dependable, with reasonable parts, tools and backyard common sense and test equipment. Look forward to a long and happy business partnership. Any tips on turning up a 300 D nonturbo, the 1978 could use it, ( a lot of grades around here, )and the 81 has already been done , I have outrun a lot of cars in it.