The block heater, if it's working correctly will typically warm the the engine by something like 15C above ambient temperatures. So if its, -35C outside, and with the block heater plugged-in for at least 4Hrs, your engine will be at -20C. (ie: 35C - 15C)

The question is, does your car start at -20C without a block heater? probably not. So charge your battery, and try to start it when the ambient temperature warms-up a bit.


Phil

__________________
'95 E300 Diesel, 264,000 Miles. [Sold it]