........I suppose. If it is below freezing, I am sure you could leave it plugged in for weeks. When I was a kid (here in western Canada) and we used Fahrenheit, we usually didn't plug in our (gas) cars till -15 or -20 F but left them plugged in for days. power was cheap. And really it still is.

__________________
Thanx,
Alberta Luthier
1983 300CD ('Stinky')155k miles, 2.47 diff, EGR removed, AAZ injectors with 265 nozzles from Sean,and vogtland lowering springs.
1984 300SD ('Old Blue')150k Klicks from Japan originally, came with rear head rests, no sunroof and never had an EGR

The block heater cord on both my MBs need replacing. The cords have lost their insulation, etc.

Is this the correct cord to replace with?

The package they came in have Zerostart written on them:

http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=2AR1EO21I2AR1F7F2D&year=1983&make=MB&model=300-DT-001&category=All&part=Block+Heater+Cord

__________________
JWJ
1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG
1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG
Biodiesel, Mobil Delvac 1, and Viton fuel lines!