I have never experienced a car heater to warm a car interior as quickly after a cold start than the current C Class.

Within half a Km & about 1 minute, heat can be felt coming through the vents with the ambient air temp.at 9'C.

The heater coolant must be drawn from the engine jacket coolant before the thermostat for it to be so warm so quickly. More info on this would be appreciated.

The car temperature guage does not read normal operating temperature before about 8 km is travelled.

On my previous vehicles it takes about 4 to 5 km for the heater to operate ie after the engine thermostat opens.

Is this a C Class secret ??!!

 

Most newer Benz engines utilizes a three stage two blade thermostat, this makes it possible to route the coolant directly from the engine block into the heater core.

btw, didnt think it it could get so cold down under?, 9 degrees C is pretty chilly

 

It's a beautiful thing to drive a Benz...there are always little surprises waiting for you!

 

lol...some good and some bad...just as long as those little surprises don't break, it is nice to find little things like that.

 

Thanks for the explanation Vic.

Yes it can be cool down under. 2'C here on the warm temperate mid north coast of NSW this morning. Last week it was snowing above 2000' in the highlands.

 

I see the car is a diesel, you must have an electric heater booster at the heater core. The electric heater gives a good deal of heat instantly even before the engine warms up.

 

This is off the point, but man, all this talk about needing a heater.

Yesterday it was 41 C here (I had to look up the conversion from F to C), so you only had to look up into the sky to find the other incredibly efficient interior heater

 

Well, wait for half a year when they talk about the temperatures in Sydney, it would be use talking about the efficient heater (or the lack of it in the US W204 gassers ) and them down under discussing about the AC system.

 

Here was 43 degree Celsius = 107.4 degree Fahrenheit

 

9 C is not that cold. I haven't driven benz in winter yet, but both toyotas would warm up in a couple of minutes in minus 10 C (you can feel pretty warm air blowing). Also it's quite normal for cars to blow warm air before normal operating temperature. Warm air comes as soon as the gauge moves slightly.

 

Haven't noticed the fast heater yet (only got the car in May), but the speed at which the airco actually starts cooling the car is damn impressive. You can feel it blowing cold air almost immediatly after starting up - my previous car would take at least one or two minutes for this to happen.

 

I apoligise , I did not mention my vehicle is a 220CDI (Diesel)

 

True that the engine does not have to reach normal temperature before the vents start blowing warm air. There is however a big difference between "toyotas" and an MB CDI engine. The efficiency of the CDI is so much better that it really does not warm up as quickly as a bad, or even a good gasser. This is why they put the electric heater to cars with a CDI engine. The electric heater really starts pushing warm air even before the gauge has moved slightly, which is very different from the toyotas.