Hot air from vents when cold - w124 300d '96

[bigyin1]

Having driven the last few mornings in the cold, I've cranked the heating up straight away and noticed i'm getting warm air from the vents very quickly, within a minute or two. On other cars i've owned I've had to wait for 10-15 minutes before getting anything resembling heat out of the vents....

Is this usual behaviour? If so how does it do it?

 

[Shude]

Having driven the last few mornings in the cold, I've cranked the heating up straight away and noticed i'm getting warm air from the vents very quickly, within a minute or two. On other cars i've owned I've had to wait for 10-15 minutes before getting anything resembling heat out of the vents....

Is this usual behaviour? If so how does it do it?

I don't know what you're used to but my w202 produces hot air within about 30 seconds!

 

[bigyin1]

mmm maybe it's just me then. Previous cars were VAG 1.9 TDi's/1.4 TDi and Peugeot 2.0 HDi's, i just remember them taking ages to warm the car up..

 

[philiggy]

Hi
Thats ok, I've had a few of these they are all the same, obviously designed for home market winters

Phil

 

[bolide]

Diesel engines produce less "spare" heat than petrol engines so it can take time to get hot air from the heater

The Multivalve diesels have an oil/water heat exchanger which dumps heat into the water system (and so the heater) when the engine is cold thereby getting round the problem

Nick Froome
www.w124.co.uk