sackboydad

So I’ve had my car for a little over a year. I’ve never sat in the back seat.

Today, it got chilly enough to turn the temperature up a bit. My back seat passenger complained it was cold. Sure enough, cold air was blasting through the two air vents in the back. In the front, the automatic control was on and it decided to just blow the heat out of the floor vents. For the LIFE of me I cannot figure out how the back is having cold air and the front has warm air.

I have a fully optioned car, except for the warmth & comfort package (I have heated/cooled seats and heated steering shell, so the only thing I’m missing is the heated arm rests).

When in doubt, RTFM.... so I tear open the manual. First, it talks about rear climate settings in the rear panel. There is no rear panel and there was no option to buy 3-Zone climate control on this model car. Second, it points several times, to the multimedia system and all the things you can set there, like Climate Style (focuses, medium or diffused) and SYNC and Residual Heat mode. I have none of these. The only two items that show up are Fragrance and ionization. Nothing else. The dealer has assured me I’m at the latest version of COMAND as it was just brought up (minor release) when I had my A check last month. Besides, the manual has this stuff being available and the manual was published August 2018.

any ideas?

usc96

Following. No idea whether this is an issue in my E53 cab, but following nevertheless. I live in the south (where it is still 90+ degrees in October) and don’t expect to have too many people riding in the back, so don’t know that it would be a big issue or not?

2012 merc amg

I have noticed on mine that it is pretty well blank when you push the menu button for climate control which I found strange. With my Wagon there is the extra zone for the back and it comes up on the screen and the back temp and fan can be regulated. Just looked on my car back seat and there are no buttons around the two vents in the rear although it looks like the vents could be closed off. Maybe the only way is to close them off and blow more warm air up front, I'd also try every setting up front such as upper vents only, etc.

usc96

Push the recycle button then see if it works. I just tried it and the back seat vents warmed up when I pressed it.

sackboydad

I'll try it but if that's the case.... yikes.

I noticed a draft in the front last night. They messed with my ragtop this week to oil and grease stuff so it would stop squeaking.... of course, feeling a draft, I immediately wondered if there was air coming from that. It was the back vents. I do not remember that last winter. It was always quite comfortable.

Also, I noticed I had to set the car to 82 degrees to feel any warmth. Seems odd...

usc96

On a positive note, must be nice to live somewhere with 4 seasons. It finally dropped into the 80s here. 😬