Still hot as can be
Thread Starter
Senior Member
Joined: Apr 2016
Posts: 357
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From: Bucks County PA not far from the Delaware River North & East of Philly by an hour.
‘68 Pontiac convertible, ‘71 Corvette 4 spd, ‘20 Accord Touring, 06 Duramax crew-c
Still hot as can be
With all the insulated glass, factory tinted windows, sun roof closed (and I thought there was some sort of power vent in these cars), it’s still hot as can be in my car. I hate to vent the roof or the windows (when I plan to go out again) because a wasp or bee could fly inside. I’ve actually burned my arm on a couple surfaces inside the car it was that hot.
I really don’t like fooling around with those reflective window covers people put in against the windshield.
All that expensive glass and I don’t believe it’s any better any other car.
Rich
I really don’t like fooling around with those reflective window covers people put in against the windshield.
All that expensive glass and I don’t believe it’s any better any other car.
Rich
Senior Member
Joined: Apr 2023
Posts: 468
Likes: 299
2014 S63 2010 ML350 Bluetec 2009 SL550
Umm...if you don't leave a window or sunroof cracked and you won't "fool around" with a sunshade - what exactly are you expecting ? Your car is a greenhouse and will become super hot without either ventilation, window shades or both.
There is no magic answer here - crack a window, use a sunshade or park under a tree.
There is no magic answer here - crack a window, use a sunshade or park under a tree.
Super Member
Joined: May 2011
Posts: 972
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From: Fort Worth TX
2020 S560, 2014 SLK55 (Prev. 2016 S65, 2013 SLK350, 2008 CLS63, 2006 E350, 2006 CLS500, 2005 C230K)
The windows are sadly not magical.
The thermodynamics are rather simple, the car takes in radiation from the sun and looses it by convection.
The convection is fairly weak as vehicle is very well insulated.
The non magic windows reduce the speed at which the temperature rises by reflecting a portion of energy heavy IR but only have a small effect on the final terminal temperature of the vehicle.
Regardless of ambient terminal temperature the surface temperature surfaces receiving radiation is more important for human comfort.
A sunshade greatly reduces the biggest source of radiation while preventing surfaces from reaching temperatures far in excess of ambient air.
Also if you have a leather dashboard it will help prevent shrinkage.
The thermodynamics are rather simple, the car takes in radiation from the sun and looses it by convection.
The convection is fairly weak as vehicle is very well insulated.
The non magic windows reduce the speed at which the temperature rises by reflecting a portion of energy heavy IR but only have a small effect on the final terminal temperature of the vehicle.
Regardless of ambient terminal temperature the surface temperature surfaces receiving radiation is more important for human comfort.
A sunshade greatly reduces the biggest source of radiation while preventing surfaces from reaching temperatures far in excess of ambient air.
Also if you have a leather dashboard it will help prevent shrinkage.
MBWorld Fanatic!
Joined: Feb 2012
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From: Phoenix
222 S-65
Newsflash! The car gets hot inside when parked outside during the summer!
OP either you park it in a climate controlled garage or accept that as with every other car on the road... it will be uncomfortable after sitting in the sun during summer.
Here in the valley of the sun even with the shade across the windshield and blinds deployed.... there are surfaces in the car that will quickly make for burns.
You could move far enough North that it doesn’t get hot in the summer.
OP either you park it in a climate controlled garage or accept that as with every other car on the road... it will be uncomfortable after sitting in the sun during summer.
Here in the valley of the sun even with the shade across the windshield and blinds deployed.... there are surfaces in the car that will quickly make for burns.
You could move far enough North that it doesn’t get hot in the summer.
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Joined: Jan 2024
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From: DFW
SL63
https://www.bestproductsreviews.com/...xoCtz0QAvD_BwE
Solar powered fan, fits in window rolled down a crack, and lowers temperature in car to ambient.
Solar powered fan, fits in window rolled down a crack, and lowers temperature in car to ambient.
Last edited by MB2timer; Jun 28, 2025 at 01:12 AM. Reason: + description
MBWorld Fanatic!
Joined: Feb 2017
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From: Baltimore County, MD
'13 s212 63 p30. '06 LX470
In today’s day and ahe it might just be easier to not believe in the greenhouse effect. Seems to be a popular opinion for many..You must be imagining it.
jokes aside, the only way to get rid of the heat is to get rid of the sun. If this is a new concept, please remember not to leave your children or animals in a locked car in the sun with the windows up. In the current heat wave, the interior of a car can easily reach near 200°F…. because when it’s near 100° in the dark, it’s still 100°…add some sun, bam, heat…lol.
And because maybe I feel this is incoming, the water under your car is from the air conditioning and it’s called condensation. You can’t do anything about that bit of science either
in the words of Jesse Pinkman “magnets!”.
jokes aside, the only way to get rid of the heat is to get rid of the sun. If this is a new concept, please remember not to leave your children or animals in a locked car in the sun with the windows up. In the current heat wave, the interior of a car can easily reach near 200°F…. because when it’s near 100° in the dark, it’s still 100°…add some sun, bam, heat…lol.
And because maybe I feel this is incoming, the water under your car is from the air conditioning and it’s called condensation. You can’t do anything about that bit of science either
in the words of Jesse Pinkman “magnets!”.
Thread Starter
Senior Member
Joined: Apr 2016
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From: Bucks County PA not far from the Delaware River North & East of Philly by an hour.
‘68 Pontiac convertible, ‘71 Corvette 4 spd, ‘20 Accord Touring, 06 Duramax crew-c
The point I intended to make - despite the marketing MB makes for the IR blocking glass on our cars that lays claim cooler interiors my car is no better heat-gain wise than any other car I’ve had. Oh, and I so enjoyed the lessons in thermal dynamics, I can’t wait to work that into my conversation at dinner tonight.
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Joined: Aug 2021
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2018 S560, 2004 SL500, 2014 S550 (SOLD), 2012 S550 x2(SOLD), 2007 CL600 (SOLD), 2007 S600(SOLD)
The point I intended to make - despite the marketing MB makes for the IR blocking glass on our cars that lays claim cooler interiors my car is no better heat-gain wise than any other car I’ve had. Oh, and I so enjoyed the lessons in thermal dynamics, I can’t wait to work that into my conversation at dinner tonight.
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Joined: Sep 2014
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S600
The point I intended to make - despite the marketing MB makes for the IR blocking glass on our cars that lays claim cooler interiors my car is no better heat-gain wise than any other car I’ve had. Oh, and I so enjoyed the lessons in thermal dynamics, I can’t wait to work that into my conversation at dinner tonight.
Given an object with non-zero albedo sitting in a 100ºF environment with sunlight, the car will always stabilize higher than 100º.
The black roof on an S-class absorbs a lot of infrared heat and convects significant amounts of that heat into the interior.
.....This causes the interior to become significantly hotter than the external environment.
.....Tinted windows INCREASE this heat gain.
The answer is to keep sunlight from hitting the black roof--thus keep the car in a garage or car port.
MBWorld Fanatic!
Joined: Jun 2015
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From: Maryland
2024 S580
The point I intended to make - despite the marketing MB makes for the IR blocking glass on our cars that lays claim cooler interiors my car is no better heat-gain wise than any other car I’ve had. Oh, and I so enjoyed the lessons in thermal dynamics, I can’t wait to work that into my conversation at dinner tonight.
Now like others have said its not magic, its similar to the heat rejection you get from good window tint. The car is still going to get hot if it sits out. Why not use the remote start from the app to start it up and let it cool down before you get into it? You also could have the windows tinted with good ceramic film and that will also improve the heat rejection even further.
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Some makes offer to have the sunshade closed while the sunroof is open, that solves the bee and other insects from entering that OP was concerned about. Given that thought, I wonder if custom coders on the forum is able to code the car to have the sunshade closed while sunroof opened?
Another thing is residual heating (in the winter) residual cooling (in the summer) for 30 minutes.
Another thing is residual heating (in the winter) residual cooling (in the summer) for 30 minutes.
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W212 FL
MBWorld Fanatic!
Joined: Jun 2015
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From: Maryland
2024 S580
Thread Starter
Senior Member
Joined: Apr 2016
Posts: 357
Likes: 56
From: Bucks County PA not far from the Delaware River North & East of Philly by an hour.
‘68 Pontiac convertible, ‘71 Corvette 4 spd, ‘20 Accord Touring, 06 Duramax crew-c
I’m not paying MB a fee just for remote start. If the Sclass was like many other cars with remote start without a membership fee then I would certainly use it.
