Greg Houston wrote:

> > There appears to be a block heater AND battery heater.

> 

> Correct.  The "Cold Weather Group" package that you have contains

> both heaters.

I'm in SW-Ontario (not somewhere way up north) and this "cold weather

group" wasn't an option at the time I bought this car, so I'm assuming

that all Canadian 300m's had this by default.

> It does use quite a bit of juice though

This battery heater says that it's 70 watts.

I put in a new battery yesterday, and I did not re-install the battery

heater.  This car has been kept in an insulated garage every evening for

it's entire life.  It's probably spent less than 100 winter nights

outside overnight over the past 12 years (probably more like 25 to 50

nights) and this will continue for the forseeable future.  The garage

has a small heater and the temp never goes below 45f during the coldest

winter nights.  So I really have no use for a battery heater.

I have plugged this cable in maybe a few dozen times to keep the engine

warm in my garage overnight, and I'll keep doing this when-ever I feel

like it, but like I said above I don't need to be heating the battery at

the same time.