W126L Rear A/C Vent

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Geoff Miller - 12 May 2006 15:11 GMT

The vent at the rear of the center console of my 300SDL
that blows air into the rear seat area works with the
air conditioning, but not with the heater; the air that
comes out is always cool.

This isn't a terribly big deal, but I like everything on
my cars to work as a matter of principle. Is this some-
thing that's relatively easy to fix?

Geoff

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Tiger - 12 May 2006 22:00 GMT

It is only for A/C... not heat. Heat comes from underneath the front
seats... so in winter, you need to shut those center vent.

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Karl - 13 May 2006 02:50 GMT

You answered your own question with the title: W126L Rear A/C Vent.

THAT is exactly what it is: A/C

Heat comes out from the ducts under the front seats.

> The vent at the rear of the center console of my 300SDL
> that blows air into the rear seat area works with the
[quoted text clipped - 6 lines]
>
> Geoff

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Richard Sexton - 16 May 2006 12:34 GMT

>You answered your own question with the title: W126L Rear A/C Vent.
>
>THAT is exactly what it is: A/C

Err, no, it's outside air and is as hot or cold as, well, outside air.

It's a "fresh air vent" in the manual.

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Geoff Miller - 16 May 2006 18:15 GMT

> You answered your own question with the title: W126L Rear
> A/C Vent.

> THAT is exactly what it is: A/C

I used the term "air conditioning" loosely. It doesn't
necessarily imply *cooled* air.

> Heat comes out from the ducts under the front seats.

Ahh, okay. Well, that certainly worked out, didn't it? :)

I guess I'd never had occasion to power the front seats forward
far enough to notice the heater ducts.

Perhaps what threw me was that I felt cold air coming out of
that vent even when the heater was on. I'd have thought that
if the vent were A/C only, all airflow through it would cease
when the air conditioning was off.

Geoff

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Richard Sexton - 15 May 2006 00:06 GMT

>The vent at the rear of the center console of my 300SDL
>that blows air into the rear seat area works with the
[quoted text clipped - 4 lines]
>my cars to work as a matter of principle. Is this some-
>thing that's relatively easy to fix?

It's not broken, It's an outside air fresh air vent, not part
of the HVAC system for which you can thank your lucky stars.

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