AS SOMEONE WHO DRIVES DIESELS YEAR ROUND...... AND LIVES IN A PLACE THAT ACTUALLY GETS COLD..... SASK CANADA.... TEMP HERE - 38 F ON SUNDAY..... I HAVE REMOVED THE WINDSHIELD WASHER TANK AND INSTALLED A SECOND BATTERY.... IN ITS PLACE..... USE A CIRCULATING HEATER THAT PLUGS INTO RAD HOSES..... AND A BATTERY BLANKET..... THE WRECKING YARDS ARE FULL OF THEM HERE!!!! ($2.00) TO PURCHASE...... THIS IS THE FORTH CANADIAN WINTER FOR MY $275.00 MERCEDES 1980 300D .........................AC.........