I'm always paranoid that some cold morning I'm going to drive away with my block heater still plugged in. What are people doing to remind themselves not to do this? Sometimes I hook the cord around the Mercedes star but often I'm parked in a place where I don't have enough cord to do this. Anybody have a foolproof solution?

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13