This is very common up here, in the cold north. Both engine block heaters, interior heaters and battery chargers are made so that you can plug it to the 230v system.

http://www.defa.com/heating.php3?lang= (Norwegian company)

http://www.calix.se/default.asp?parSprak=UK (Swedish company)

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If you have a 5 cylinder, you don't need a stereo.

1999 Audi A6 quattro
1990 Volkswagen Golf CL Syncro
1987 Audi Coupe quattro