[W126 Coupe] Rear Vent: Hot Air

[Dawid Loubser]

Güten morgen,

I've often read (and as a quick search example, this post also states  
so: http://db.mercedes.cx/sec/199910/0166.html) that
the rear vent only blows cold air (fresh, or airconditioned). I can  
however state that my 1990 560SEC most certainly
provides both cooled and hot air though the rear vent - This was  
demonstrated this morning when it blew cold air
(windows closed, driving in the sun) but a few moments after I opened  
all my windows, it started blowing hot air in the
rear as well as the front to compensate.

The only "cold-air-only" vents on my car are the main ones on the  
dashboard, as they should be. This is a small thing, but
I am curious about why there are often posts stating that the only  
hot air to the rear are through the footwell vents,
whilst this is demonstrably not true in my case. This is either a  
Euro/US difference, or maybe a later model year update, or it's
just something that regularly malfunction on people's cars?

Can we settle this? Does anybody have accurate information?

kind regards,
Dawid