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Did Tesla Forget about Windshield Defogger Vents again?

AMN

Supporting Member
May 24, 2013
399
1,855
MSP, NYC, BZN
It was a big issue on Model S that required a custom installation of vents along the base of the windshield.
From the photo below it looks like we will have to go through this again... :crying:
Ugh!


Screen Shot 2015-10-03 at 11.23.11 AM.png

Sorry for stealing somebody's picture. Saved it a while ago, don't remember member's name.
 

fwgmills

Supporting Member
Jun 30, 2015
151
70
Roanoke, TX
Without trying to start a rumble....

There were some windshields some years ago that had some kind of electrochromatic film or something where the windshield was one giant defroster. You just applied an electric current and the entire windshield would warm slightly and melt the ice. I never owned a vehicle with it but I know someone who did. It was pretty neat but no signals work through it like radar detectors and (probably now) GPS. I guess it's possible that they toyed with using something like this rather than use typical defroster vents or because of the size of the windshield perhaps the vents are somewhere else.
 
  • Informative
Reactions: 9837264723849

trils0n

2013 P85
Feb 12, 2013
1,527
1,947
SF Bay Area
Perhaps they figured out how to make the vents work effectively under the grill. FWIW, my Model S doesn't have the visible vents, and has no issues defrosting. I dislike the visible vents when I have a loaner with them, because they reflect on the windscreen.

It also looks like they added extra defrost vents for the door windows (new vent on far left of dash), so they didn't totally disregard the defrosting functionality.
 

FlasherZ

Sig Model S + Sig Model X + Model 3 Resv
Jun 21, 2012
7,024
1,014
+1 trils0n.

I didn't have the retrofit done and my defroster works reasonably well. I imagine it would work better with the vents, but I like the original look better.
 

Aljohn

Member
Oct 17, 2014
907
505
Georgia
Hate to admit, but old enough to have owned a Lincoln Town Car with the automatic defrosting heated windshield. Just press a button and it would melt frost and some ice off the windshield. If not enough to completely eradicate, certainly to detach the ice from the windows surface which limited the amount of scraping needed.

It worked OK, but was soon discontinued... I would imagine due the expense of the option and too few orders. It was on the car when I bought, so I had it. Since the car was in the garage most of the time, I wouldn't have paid for it as an option.
 

mknox

Well-Known Member
Aug 7, 2012
10,103
1,868
Toronto, ON
I HAD to have the retrofit done on my Model S because it just couldn't clear the whole windshield and particularly, the side windows. I am encouraged to see that the photo shows side window vents on the Model X (way over to the left on the top of the dash in the picture). Early prototype photos of the Model S showed similar vents on the A-pillars, but they never made it in to production.

Perhaps the "speaker grille" vent along with the side window vents will be enough.
 

yobigd20

Well-Known Member
Oct 28, 2012
5,929
532
Skaneateles, NY
Without trying to start a rumble....

There were some windshields some years ago that had some kind of electrochromatic film or something where the windshield was one giant defroster. You just applied an electric current and the entire windshield would warm slightly and melt the ice. I never owned a vehicle with it but I know someone who did. It was pretty neat but no signals work through it like radar detectors and (probably now) GPS. I guess it's possible that they toyed with using something like this rather than use typical defroster vents or because of the size of the windshield perhaps the vents are somewhere else.

range rover has this, and it's distracting. it's like looking through a screened in window.
 

ItsNotAboutTheMoney

Well-Known Member
Jul 12, 2012
10,620
7,795
Maine
Without trying to start a rumble....

There were some windshields some years ago that had some kind of electrochromatic film or something where the windshield was one giant defroster. You just applied an electric current and the entire windshield would warm slightly and melt the ice. I never owned a vehicle with it but I know someone who did. It was pretty neat but no signals work through it like radar detectors and (probably now) GPS. I guess it's possible that they toyed with using something like this rather than use typical defroster vents or because of the size of the windshield perhaps the vents are somewhere else.

In the mid-late 80s, my dad had a Ford Escort Ghia with a heated windshield. This was in the UK. Well, he got it in Germany, but it was right-hand drive. The windshield had a fine mesh in it.
 

aija SigX 649

Winged Lion
Sep 4, 2015
324
74
PA/NJ
A buddy who owns a model S says that the car has a heated windshield and headed windshield wipers. He's never had any issues with defogging/defrosting here in the northeast. Could this be the same setup on the X?
 

Lyon

2016 S P100DL, 2016 X P90D
Dec 26, 2011
2,004
215
Eugene, Oregon
A buddy who owns a model S says that the car has a heated windshield and headed windshield wipers. He's never had any issues with defogging/defrosting here in the northeast. Could this be the same setup on the X?

I suppose it's possible your buddy had this added aftermarket but Model S doesn't have a heated windshield option and, to my knowledge, never has.

I did have the air vent retrofit done to my Model S. It does not look as good but it performs much better.

I've also had a Land Rover with the thin wire heating elements built into the windshield. I did not find them to be distracting and they worked really well. That would be an okay solution.
 

Saghost

Well-Known Member
Oct 9, 2013
8,217
7,010
Delaware
Without trying to start a rumble....

There were some windshields some years ago that had some kind of electrochromatic film or something where the windshield was one giant defroster. You just applied an electric current and the entire windshield would warm slightly and melt the ice. I never owned a vehicle with it but I know someone who did. It was pretty neat but no signals work through it like radar detectors and (probably now) GPS. I guess it's possible that they toyed with using something like this rather than use typical defroster vents or because of the size of the windshield perhaps the vents are somewhere else.

We use these in a lot of helicopters that have to fly in all sorts of weather. They're expensive and don't have the best reliability track record (in rough service conditions in a very high vibration environment, keep in mind,) but they work pretty well and the ones they use in big helicopters are pretty much invisible (the heating element is ITO - transparent conductive material.)

What I find interesting is that there's no visible center dash vent for the main windshield, but there are clear dedicated vents for the driver's side window.
Walter
 

green1

Active Member
Mar 25, 2014
4,548
1,123
Calgary, Alberta, Canada
A buddy who owns a model S says that the car has a heated windshield and headed windshield wipers. He's never had any issues with defogging/defrosting here in the northeast. Could this be the same setup on the X?
He has the sub-zero weather package, it includes what Tesla calls heated wipers, which is actually not a heated wiper, but in fact a heated strip at the bottom of the windshield where the wipers park. It does nothing to defrost the windshield beyond the bottom inch, but it does help a little bit with wipers freezing to the glass. Most likely his lack of issues on his MS have nothing to do with that feature, and are because he has working defroster vents, all current MS have them, and only the early ones tried to do with ones hidden under a screen, many of those have been retrofitted to the new vents too.

I had the "heated wipers" on my last vehicle, wasn't really all that useful, helped a bit, but I wasn't too upset that the MS I found doesn't have it.

My old Mercedes had an interesting rear defroster though, it was the same idea as the ones we're all familiar with, lines on the glass, however the lines were extremely fine, and much closer together, the result was that they were almost invisible, but worked quite effectively, still a bit too much distortion for a windshield, but I really liked them on the rear window.
 

aija SigX 649

Winged Lion
Sep 4, 2015
324
74
PA/NJ
He has the sub-zero weather package, it includes what Tesla calls heated wipers, which is actually not a heated wiper, but in fact a heated strip at the bottom of the windshield where the wipers park. It does nothing to defrost the windshield beyond the bottom inch, but it does help a little bit with wipers freezing to the glass. Most likely his lack of issues on his MS have nothing to do with that feature, and are because he has working defroster vents, all current MS have them, and only the early ones tried to do with ones hidden under a screen, many of those have been retrofitted to the new vents too.

I had the "heated wipers" on my last vehicle, wasn't really all that useful, helped a bit, but I wasn't too upset that the MS I found doesn't have it.

My old Mercedes had an interesting rear defroster though, it was the same idea as the ones we're all familiar with, lines on the glass, however the lines were extremely fine, and much closer together, the result was that they were almost invisible, but worked quite effectively, still a bit too much distortion for a windshield, but I really liked them on the rear window.

Hmm. You're probably right. He's got an early model (2013) before the D was available. I'll have to ask him about what he meant by heated windshield.
 

Saghost

Well-Known Member
Oct 9, 2013
8,217
7,010
Delaware
My old Mercedes had an interesting rear defroster though, it was the same idea as the ones we're all familiar with, lines on the glass, however the lines were extremely fine, and much closer together, the result was that they were almost invisible, but worked quite effectively, still a bit too much distortion for a windshield, but I really liked them on the rear window.

I had those on my ancient (1983, bought in 2000) 300sd. I liked it a lot - the lines were thin enough and far enough away that they were past the Nyquist limit (and thus invisible.) Of course, to make them that thin, Mercedes made them very fragile - and so they used laminated glass (and I believe they put the wires between the layers, but I'm not 100% sure.) Like a lot of those W126 cars, my rear window started to delaminate in the outer lower corners...
Walter
 

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