MB got it right when they decided to install them in every 603 engine sold here in the US. It was a easy task to install the power cord on the 20 year old, never been used block heater.

-Jim

__________________
1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.