Just got a JUMBO one for my MAX. wish I did this when I Initially bought it. Until the AC cut out I didn't realize how hot the car gets.

 

just put a digital temp gauge on the shade under the windshield it's up to 148 degrees just 30 minutes later.

 

just checked up on it right after the previous post gauge interface turned black like a digital malfunction. I brought it inside and it registered at 155 degrees.

 

if you have a Sun roof, park the car with the rear flipped up. open the sun shade a couple of inches .

this helps keep the temperature down a bit.

 

My black leather interior forces me to use a windshield sun visor. The pop up factory rear shade also helps the interior stay cool(er).

 

Electronically controlled window tinting?
Deep black tint on sunny days and within a push of a button it's back to regular glass.

 

For me the best sunshade is the lightweight cheap ones, cause I get get them up quickly. Also when I accidentally hit my wife with it she gets less mad :-)

Also leaving all 4 windows cracked, sun roof cracked with the pull back shade leaving just a crack open.

Also have you ever made a personal cooler:
- ice chest
- 12V water pump
- tubing.

Just make a tube for your back and bottom and you'll be great.

 

That's funny, i was thinking the same thing, I've seen Glass for office buildings that can tint automatically and then go back to transparent, shouldn't be difficult to do it for a car.

Google is you're friend. :-D

 

I know Nissan being one of the manufacturers that installs loaded bombs in cars(airbags) will innovate a clever way to prevent child deaths