C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Question about cabin heating

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Old Nov 9, 2024 | 05:33 AM
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C-class 200CDI
Question about cabin heating

Hello,

I got also S205 (but I am keeping my S204 and prepared it for long winter sleep ) and noticed that immediately I start the engine in S205 the hot air goes instantly into the cabin if temperature is set to hot, for example 24 degrees Celsius (75,2 in Farhenheits).
In my S204 it takes sometimes up to 10 minutes to hot air start blowing into the cabin (need to wait until the engine is warmed up to working temperature of 86 degrees Celsius). Is this normal thing? Ok, maybe not 10 minutes, but 5 minutes at least.
I think I had it like this in almost 13 years of ownership, but not sure 100% because I noticed this on newer model. Is this some sort of normal behavior, or this is some sort of additional equipment that you car need to have?
I remember when my dad had W124 it also heated immediately - if I am not wrong there is some system of high pressure valves that start heating just after the engine starts.
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Old Nov 9, 2024 | 02:09 PM
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2014 c300 w204.080 3.5 v6
I don't let my car idle very long. I have the v6 enginee. I start up wait 60 second and drive. I usually have great writing a couple of minutes off driving no matter the weather.
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Old Nov 9, 2024 | 02:13 PM
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C-class 200CDI
I also drive instantly but on older S204 hot air inside cabin is not immediate thing - need to wait for it at least 5 minutes. Does your blow instantly hot air inside the cabin if it is set to hot?
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Old Nov 9, 2024 | 02:17 PM
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2014 c300 w204.080 3.5 v6
Is the blower running on high when the car warms up? It won't run the blower in auto until three enginee warms up then it will slowly raise blower speed.
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Old Nov 9, 2024 | 02:22 PM
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C-class 200CDI
It is almost always at speed level 4 (have also level 5 when you can hear the blower while driving, level 6 when you can really hear it loud and max level) and my A/C is turned off during the cold period of year like now (Autumn and Winter).

Don't know if turning A/C would help to heat more immediately (never used A/C during the winter).

So, it is like I assumed - you need to wait few minutes of driving so the engine get to the work temperature and then it will blow hot air.

To have it blow hot air immediately after starting the engine you need to have this system of high pressure valves that I have on S205 and my father had in W124.
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Old Nov 9, 2024 | 02:30 PM
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From: Northern Indiana
2014 c300 w204.080 3.5 v6
I personally leave mine in auto at the same temp prolly for 8 years now lol. The ac light being on doesn't mean that it's running the compressor just that it can if it wants to in auto. At times in the cold it will turn on the ac and front defrost vents to warm the windshield slowly. I've never seen one crack in the cold but many cars do this too warm the windshield.
My wife is like you it sounds and likes to turn the blower speed up manually and choose the vent arrangements manually. I let auto make the decisions.
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Old Nov 9, 2024 | 02:33 PM
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C-class 200CDI
Originally Posted by RobertR728
I personally leave mine in auto at the same temp prolly for 8 years now lol. The ac light being on doesn't mean that it's running the compressor just that it can if it wants to in auto. At times in the cold it will turn on the ac and front defrost vents to warm the windshield slowly. I've never seen one crack in the cold but many cars do this too warm the windshield.
My wife is like you it sounds and likes to turn the blower speed up manually and choose the vent arrangements manually. I let auto make the decisions.
Thanks. Yeah, I like it silent so can listen music normally. Will try setting it on Auto.
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Old Nov 9, 2024 | 02:49 PM
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On cold weather markets, MB install a PTC electric booster and this help air to blow hot air ( not quite very hot) almost instantly.

Cars sold for hot countries doesn't have this small electric radiator ( PTC).


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Old Nov 9, 2024 | 02:56 PM
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C-class 200CDI
Originally Posted by trigital
On cold weather markets, MB install a PTC electric booster and this help air to blow hot air ( not quite very hot) almost instantly.

Cars sold for hot countries doesn't have this small electric radiator ( PTC).

Thanks. So this is this magical item.
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Old Nov 9, 2024 | 04:24 PM
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In winter I start the car and immediately push the heated seat button. Depending on if there is snow or ice on the windows I may let the car warm up just to get some visibility but thats the only reason I will let it idle. I typically start the car and go. Warm air starts coming out fairly quick if I remember correctly, in a minute or two. Its not hot air, but can tell its getting warmer.
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