W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

First of all, it's not December 31, 1969, but instead is April 9, 2008. I have a 1990 300TE that had a heater hose break, and the dumb fool poured cold water into the radiator bottle. Now I have oil in the water (though no water in the oil!). Advance Auto sells this bottle of green fluid that GUARANTEES to fix leaks in head gaskets, cracked blocks, valve cover gaskets, etc. that is added to water. The big hitch is that the car must be able to idle for 50 minutes while the stuff does it's thing. One thing I found out; a cracked block is not conducive to idling more than a couple of minutes - much less 50 minutes (no wonder it's guaranteed to work if you follow the directions to the letter).

I recently replaced the dash instrument assembly in my 1985 300DT and now I have a few spare parts, like the old still functioning tach. What is involved in installing a tach on my 1982 240D. Is it an electrical or a mechanical pickup?

Looking for insight before I pull the trigger on a gallon of MP. I'm in the process of having my lifelong Santa Barbara CA 1980 240D repainted and the body guy tells me the bottom of the doors under the seal are rusted pretty bad. Ugh. I specifically bought a CA car to avoid this!

I just bought a used 1979 300td Wagon which started up great when I test drove and picked it up. The next morning it would not start but it does crank and lets noticeable smoke out of the tailpipe. The overnight temperature was about 10C, I plugged in the block heater for a few hours before my second attempt and still no luck. The battery has strong charge, the glow light comes on and the glow plugs were just serviced. I know the vales need are in need of an adjustment. Could someone tell me if it is compression related and suggest some trouble shooting and advice??? Thanks.