While my '75 300D had a block heater, I rarely got to use it as I was living in an apartment. Despite this, I was routinely able to start ol' Blue in temperatures below zero. Only when the temp got less than 10 below zero and when the starter was cranking slow did I have problems. When the starter was slow, I was even having problems in warm weather!

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)