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Change battery

Electrical and Electronic

Model: 997, Year:2007, Mileage:20000, Type of use:Street use only
Your response to issue 09.23.2010 is confusing after reading the article in the latest issue of "Excellence" on Porsche Electrical Systems. Excellence states that it is mandatory to never allow the car to be without a 12v. power supply or many systems will lose their settings, and some of these are very difficult to recover. You are saying nothing about retaining 12 volts at all times on the car, i.e., never disconnect the battery without first hooking in an auxiliary 12 volt supply. Please provide the correct directions to this issue.Thank you.Howard Renner

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