C55 interior temperature control
Thread Starter
Member
Joined: Apr 2003
Posts: 212
Likes: 0
From: Bay Area, CA
2015 GL550, 2019 GLC350e
C55 interior temperature control
even when the temp setting is at the lowest, there seems to be warm air blowing in, when the outside temp is hovering around 63-65F.
of course if i turn on the a/c, then cold air will blow in. but i shouldn't have to use a/c when the outside temp is colder. is there anyway the dealer can calibrate the temp setting?
i also feel like there is hot air coming into the cabin, not sure if it's from the firewall or underbody. will have to crawl around one day when the engine is running.
of course if i turn on the a/c, then cold air will blow in. but i shouldn't have to use a/c when the outside temp is colder. is there anyway the dealer can calibrate the temp setting?
i also feel like there is hot air coming into the cabin, not sure if it's from the firewall or underbody. will have to crawl around one day when the engine is running.
Member
Joined: Aug 2007
Posts: 173
Likes: 2
From: Central Florida
C32 AMG - RIP :(
Not sure if it helps, but when I turn off the A/C via the button, the air coming in the vents gradually changes to be close to or the same as the temperature outside.
Not sure when the air coming in would be warm when the outside air is cold. Check and see if it does the same thing when first starting the car. This would eliminate engine heat from causing the warm air. If the engine is cold, the outside air is cold, and the air coming in from the vents is warm.....probably something wrong.
Not sure when the air coming in would be warm when the outside air is cold. Check and see if it does the same thing when first starting the car. This would eliminate engine heat from causing the warm air. If the engine is cold, the outside air is cold, and the air coming in from the vents is warm.....probably something wrong.
MBWorld Fanatic!
Joined: Oct 2002
Posts: 1,598
Likes: 0
I have *****ed about this forever to my very close master mechanic/ shop foreman at the dealership. The deal is that the control doors don't just change instantaneously they do it very gradually, hence why any and all changes do not appear to do much of anything, although they do after a couple of minutes. They can also sync the doors and I noticed this helps a tad, but the entire system is rubbish. He even stated "I don't know why they even put numbers on the knobs"
Another thing to make sure of is that the filter and intake cover is property installed, it's very common for it not to be seated properly which will allow hot underhood air in. I also have an activated charcoal filter which makes a world of difference.
Another thing to make sure of is that the filter and intake cover is property installed, it's very common for it not to be seated properly which will allow hot underhood air in. I also have an activated charcoal filter which makes a world of difference.
Thread Starter
Member
Joined: Apr 2003
Posts: 212
Likes: 0
From: Bay Area, CA
2015 GL550, 2019 GLC350e
I have *****ed about this forever to my very close master mechanic/ shop foreman at the dealership. The deal is that the control doors don't just change instantaneously they do it very gradually, hence why any and all changes do not appear to do much of anything, although they do after a couple of minutes. They can also sync the doors and I noticed this helps a tad, but the entire system is rubbish. He even stated "I don't know why they even put numbers on the knobs"
Another thing to make sure of is that the filter and intake cover is property installed, it's very common for it not to be seated properly which will allow hot underhood air in. I also have an activated charcoal filter which makes a world of difference.
Another thing to make sure of is that the filter and intake cover is property installed, it's very common for it not to be seated properly which will allow hot underhood air in. I also have an activated charcoal filter which makes a world of difference.
Trending Topics
Member
Joined: Aug 2007
Posts: 173
Likes: 2
From: Central Florida
C32 AMG - RIP :(
I did a little test today. Driving down the highway I pushed the A/C off button. The air blowing in stayed cold for 7 full minutes! Then, after 7 minutes it FINALLY switched the A/C compressor off and the air changed to outside temperature (102 degrees!) instead of the 70 degrees I had it set on with the A/C on.
I wish I knew why it takes so dang long for the system to respond.
I'd like to be able to turn the A/C off and run fresh outside air through the system to "dry" it out before parking for the day at work or evening at home.
I wish I knew why it takes so dang long for the system to respond.
I'd like to be able to turn the A/C off and run fresh outside air through the system to "dry" it out before parking for the day at work or evening at home.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Member
Joined: Aug 2004
Posts: 207
Likes: 1
From: Redondo Beach
Z06, M3, Mini Cooper S. Sold: C55
If you want the "AC OFF" to actually shut the compressor down quickly (less than several minutes), you'll need to manually disable the "AUTO" mode & actually shut the fan off for a few seconds. Then you can turn the fan back on & the AC compressor will be off.
Thread Starter
Member
Joined: Apr 2003
Posts: 212
Likes: 0
From: Bay Area, CA
2015 GL550, 2019 GLC350e
even when the temp setting is at the lowest, there seems to be warm air blowing in, when the outside temp is hovering around 63-65F.
of course if i turn on the a/c, then cold air will blow in. but i shouldn't have to use a/c when the outside temp is colder. is there anyway the dealer can calibrate the temp setting?
i also feel like there is hot air coming into the cabin, not sure if it's from the firewall or underbody. will have to crawl around one day when the engine is running.
of course if i turn on the a/c, then cold air will blow in. but i shouldn't have to use a/c when the outside temp is colder. is there anyway the dealer can calibrate the temp setting?
i also feel like there is hot air coming into the cabin, not sure if it's from the firewall or underbody. will have to crawl around one day when the engine is running.
