Joegolden,

The heater is in there on the 87 300D's, you just have to buy the plug and put it in. 15 minute job.

-Jim
Let's Wire Up the Block Heater!

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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.