For no apparent reason, the battery which had started the 95 E320 in colder weather than this failed to start it a couple of weeks ago--so took it out and replaced it with the battery from my parked Ford Explorer. It fit O.K., and this seemed to be fine, but then noticed for the 1st time the climate control wasn't working properly. It won't run the A/C, or at least not through the center vents, and won't change the destination of the airflow, regardless of the position of the buttons. Cannot get air to go to the floor. The temp wheel seems to be working fine, as is fan speed. Then the Explorer battery apparently boiled over and leaked some acid. Voltage with engine running, at idle and revving, is about 14.5, so assume the regulators ok--is the climate problem a coincidence? How do I fix?

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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