The mk1's connectors did suffer a littleI've had my Mk1 for nearly a year now, and I remove it from the car
constantly. At home, at the office, when I go to lunch, when I go to the store, etc. It probably goes through 15-20 removals a week. It's still working fine.
I did have a little trouble with the connector for a while, but a really good cleaning seems to have solved the problem.
So, to answer the original question: Yes, if the outside temperatures are extreme, it's better to remove the Empeg. Don't worry about the connectors, worry about the hard drives.
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Tony Fabris