And don't say 'the wall'!
My 82 300d supposedly has an engine block heater. These past few weeks have been pretty cold, so I thought I would help the engine and plug it in overnight. Last night, I did just that, but nothing warmed up. Upon further investigation under the front bumper (where the heater cord is located), I found that both sides of the plug were free. I can't seem to find where the engine block heater plugs in. Can you help me, please?

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1982 Silver 300DT