I should rephrase my initial statements regarding batteries in the back seat. There are probably many good reasons for having them back there AND if the car owner takes the time to service the battery and make sure it isn't rusting a whole in his floor plan, it's probably a great idea. I just think that hidden away under a seat, it's more subject to neglect by people who don't take care of their cars. But then again, these kinds of people probably wouldn't care if it was rusting everything away under the hood so it probably doesn't matter.

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Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)