[W124] W124list Digest, Vol 29, Issue 1

[BZ Girl]

HI
I have had that sound periodically when I use the heater setting(red zone on
the temp dial)..even with in the EC mode...
somtimes the air will come out cold or luke warm after I hear the sound..but
if I keep switching back from high to low with the fan switch I can get it
to blow hot air again....or switch to the defrost setting...and back to the
EC mode or one of the heater settings..the air will come out again very
hot..
There is nothing wrong with the heater ...especiallcially since I can have
it on the lowest fan setting in the EC mode and I will have to crack the
window...or the sunroof..as it gets quite warm in the passenger
compartment...and I just had a completely all new a/c parts replaced and
 installed last summer...but I know of that clicking noise you speak of....

Dana
1988 300CE / 212K + and counting:)



On 12/21/07, w124list-request at mbcoupes.com <w124list-request at mbcoupes.com>
wrote:

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> Today's Topics:

>

>   1. Re: [Mercedes] I'm sticking with my current MB for a while,

>      so a new and challenging question (Steve Nervig)

>   2. Re: [Mercedes] I'm sticking with my current MB for a while,

>      so a new and challenging question (rycstch at bellsouth.net)

>

>

> ----------------------------------------------------------------------

>

> Message: 1

> Date: Thu, 20 Dec 2007 14:21:57 -0800

> From: Steve Nervig <dakota at mac.com>

> Subject: Re: [W124] [Mercedes] I'm sticking with my current MB for a

>        while,  so a new and challenging question

> To: Alec Cordova <benzaholic at gmail.com>

> Cc: w124 List <w124list at mbcoupes.com>,  Mercedes Mailing List

>        <mercedes at mercedesmailinglist.com>

> Message-ID: <DA9085CE-37B3-4275-8BB3-E142DE8A9991 at mac.com>

> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes

>

> On Dec 20, 2007, at 12:40 PM, Alec Cordova wrote:

>

> > I didn't get that 1980 300SD on eBay, but I did get something

> > interesting out of my 89 300CE the other day.

> >

> > The climate control air recirculation button, up on the dash with the

> > rear defrost and rear light buttons, started blinking at a consistent

> > rate, somewhere around half as fast as my turn signals blink. What the

> > heck does this mean?

> >

> > Car is an 89 300CE (US model) with 231K miles. Climate control only

> > partially works. I get decent temperature control, but the fan doesn't

> > work, and the system has virtually no control of the vents. Ram air

> > comes through the side vents, the defrost vents, and the floor vents,

> > although I do seem to get a little more from the floor vents when I

> > select bilevel A/C instead of just Econ mode.

> >

> > It got warm again here in central Texas just a week or two ago (low

> > 80s), and I heard a cyclical snapping sound from behind the dash

> > (slightly toward the passenger side?) that could have been the ACC

> > trying to change the air routing, but with no success. It was at least

> > a week after that event, which has not recurred, that I got the

> > flashing recirc button, and it happened while driving home in the

> > evening, so the system was in heating mode. While flashing, the air

> > coming from the side and defrost vents _almost_ felt a little hotter

> > than usual, and it may have been coming out of the defrost vents more

> > than usual, although I rarely feel up there to see how much air comes

> > through.

> >

> > Selecting the Off switch on ACC did not stop the flashing. It was gone

> > the next morning when I started the car, and it has not yet returned.

> >

> > Anybody know the answer, other than just guessing that my climate

> > control pushbutton unit had a minor stroke?

> >

> > Thanks,

> > Alec Cordova

> > Taylor, Texas

> > 89 300CE, 231K

>

> Alex, I found this thread pertaining to the W126, but the systems are

> similar. Not real sure if it answers the question:

> <

> http://www.benzworld.org/forums/w126-s-se-sec-sel-sd-sdl-class/1310594-why-my-air-recirculation-switch-blinking.html

> >

>

> This link seems a bit more definite - suggest low voltage (alternator

> brushes?), but also suggesting that you have connected a diagnostic

> tool (hmmm):

> <http://mercedesshop.com/shopforum/showthread.php?p=1657902>

>

> I have read about a similar situation with seat heater switches -

> blinking LED means not enough voltage.

>

> How are your brushes?

>

> Regards,

> Steve

> 1992 300CE Sportline

>

>

>

>

> ------------------------------

>

> Message: 2

> Date: Fri, 21 Dec 2007 07:22:49 -0500

> From: <rycstch at bellsouth.net>

> Subject: Re: [W124] [Mercedes] I'm sticking with my current MB for a

>        while,  so a new and challenging question

> To: "W124 CE Coupes and Convertibles" <w124list at mbcoupes.com>,  "Alec

>        Cordova" <benzaholic at gmail.com>

> Cc: Mercedes Mailing List <mercedes at mercedesmailinglist.com>,   w124

>        List <w124list at mbcoupes.com>

> Message-ID: <000301c843cc$34b4c270$030a0b0a at Steve>

> Content-Type: text/plain; format=flowed; charset="iso-8859-1";

>        reply-type=response

>

> I'm selling my 1991 300CE coupe with 221K miles.  I've owned it for over

> 12

> years (2nd owner) and have a stack of maintenance and repair history

> totalling over $28,000 during my ownership period.  Car is Black with

> Palomino and has the factory Sportline suspension installed.

>

> Car has lived it's entire life in Georgia (no rust!) Looking for $6,100.

>

> Only reason for selling is I picked up a W124 wagon to haul our new baby

> around.

>

> Steve Chapman

> "Chappy"

>

> ----- Original Message -----

> From: "Steve Nervig" <dakota at mac.com>

> To: "Alec Cordova" <benzaholic at gmail.com>

> Cc: "w124 List" <w124list at mbcoupes.com>; "Mercedes Mailing List"

> <mercedes at mercedesmailinglist.com>

> Sent: Thursday, December 20, 2007 5:21 PM

> Subject: Re: [W124] [Mercedes] I'm sticking with my current MB for a

> while,so a new and challenging question

>

>

> > On Dec 20, 2007, at 12:40 PM, Alec Cordova wrote:

> >

> >> I didn't get that 1980 300SD on eBay, but I did get something

> >> interesting out of my 89 300CE the other day.

> >>

> >> The climate control air recirculation button, up on the dash with the

> >> rear defrost and rear light buttons, started blinking at a consistent

> >> rate, somewhere around half as fast as my turn signals blink. What the

> >> heck does this mean?

> >>

> >> Car is an 89 300CE (US model) with 231K miles. Climate control only

> >> partially works. I get decent temperature control, but the fan doesn't

> >> work, and the system has virtually no control of the vents. Ram air

> >> comes through the side vents, the defrost vents, and the floor vents,

> >> although I do seem to get a little more from the floor vents when I

> >> select bilevel A/C instead of just Econ mode.

> >>

> >> It got warm again here in central Texas just a week or two ago (low

> >> 80s), and I heard a cyclical snapping sound from behind the dash

> >> (slightly toward the passenger side?) that could have been the ACC

> >> trying to change the air routing, but with no success. It was at least

> >> a week after that event, which has not recurred, that I got the

> >> flashing recirc button, and it happened while driving home in the

> >> evening, so the system was in heating mode. While flashing, the air

> >> coming from the side and defrost vents _almost_ felt a little hotter

> >> than usual, and it may have been coming out of the defrost vents more

> >> than usual, although I rarely feel up there to see how much air comes

> >> through.

> >>

> >> Selecting the Off switch on ACC did not stop the flashing. It was gone

> >> the next morning when I started the car, and it has not yet returned.

> >>

> >> Anybody know the answer, other than just guessing that my climate

> >> control pushbutton unit had a minor stroke?

> >>

> >> Thanks,

> >> Alec Cordova

> >> Taylor, Texas

> >> 89 300CE, 231K

> >

> > Alex, I found this thread pertaining to the W126, but the systems are

> > similar. Not real sure if it answers the question:

> > <

> http://www.benzworld.org/forums/w126-s-se-sec-sel-sd-sdl-class/1310594-why-my-air-recirculation-switch-blinking.html

> > >

> >

> > This link seems a bit more definite - suggest low voltage (alternator

> > brushes?), but also suggesting that you have connected a

> diagnostic  tool

> > (hmmm):

> > <http://mercedesshop.com/shopforum/showthread.php?p=1657902>

> >

> > I have read about a similar situation with seat heater switches -

> > blinking LED means not enough voltage.

> >

> > How are your brushes?

> >

> > Regards,

> > Steve

> > 1992 300CE Sportline

> >

> >

> > _______________________________________________

> > W124list mailing list

> > W124list at mbcoupes.com

> > http://www.pairlist.net/mailman/listinfo/w124list

> >

>

>

>

>

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>

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> End of W124list Digest, Vol 29, Issue 1

> ***************************************

>

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