Now has new MB recommended battery, electrical system operating correctly--I guess the other batt was junk. But now the climate control system!

I did jump the car the first time the original batt died and replaced with the Explorer batt soon after.

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2002 Mercedes-Benz E320 4Matic
1995 Mercedes-Benz E320 Wagon
2005 Land Rover LR3 V8 SE
1999 Audi A8 4.2L quattro