[W126 Coupe] Speedometer

[Dick Spellman]

Hi Jonathan,

I guess I should not be surprised as it's an off model sensor that was 
not designed specifically for the MB.  Where you are a pro-wrench, I can 
see where recommending anything other than MB would come back to you as 
a problem that you would need to support.

Take care,
Dick



Jonathan Hodgman wrote:

> Dick,

>

> They 'work' OK from the drivers seat, but once you set up a stand 

> alone wide band a/f ratio gaugethey are not doing so well in the long 

> term.

> Mostly what I find is WOT is lean, and cruising is a bit on the rich 

> side.  I don't have these problems when I run the correct O2.  Plus, 

> O2'sfall off gradually which makes it Difficult to discern any difference.

>

> Jonathan

>

> Blue Ridge Mercedes/AMG East

> Offering Enthusiast Service, Restoration and Tuning.

> Located in the Greater Atlanta area.

> http://www.blueridgemb.com

> 404 805 1357

>

> 1996 S600 Euro

> 1991 560SEC  Euro ECE

> 1991 560SEC GT28 Conversion

> 1990 500SL Japan

> 1989 190E 2.6 factory 5sp

> 1989 560SEC ECE AMG Japan

> 1989 560SEC AMG Solid Lifter/6800rpm

> 1988 300TE

> 1987 300E AMG

> 1986 560SEL AMG 6.0L 32V

> 1986 AMG Hammer 6.0L 32V

> 2006 Z4 3.0Si M spec 6sp

>

>

> On Mon, Apr 13, 2009 at 11:16 AM, Dick Spellman 

> <dick.spellman at gmail.com <mailto:dick.spellman at gmail.com>> wrote:

>

>     I am using Bosch O2 Sensors found at this link

>     <http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_Oxygen-Sensor-Bosch_3486230-P_291_R|GRPEMISAMS_909569295___>

>     <http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_Oxygen-Sensor-Bosch_3486230-P_291_R%7CGRPEMISAMS_909569295___>

>     They are working properly for me.  One MB has 30k, another 40k

>     miles and one other with 70k miles on it with the above sensor in

>     use.  My notes show I purchased the O2 sensor (3-wire) with longer

>     lead (the one in this link) so I could do the staggered soldered

>     splice with heat shrink tubing up in the footwell.   Can't say if

>     others have issues or if they fail prematurely as I only have the

>     three MB's running with the above sensor and my mileage experience

>     is somewhat limited.

>     You'll need a vacuum gauge with hose and fittings to locate the

>     leak.  There is a link to troubleshooting up on the web somewhere

>     that illustrates how to isolate the vacuum groups on the MB

>     engine.  Perhaps someone on the list can kick in the link.  I

>     think it's Steve Botherton's(sp).

>     Dick

>

>     terrako at comcast.net <mailto:terrako at comcast.net> wrote:

>>

>>

>>     Thanks Markus, any idea where I should began to look for the

>>     leak?  Would you happen to have any instructions on the O2

>>     wireing and what replacemt to obtain.

>>

>>      

>>

>>     TS 

>>

>>

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

>>     From: "Markus Meyer" <mfm at meyerprobateproperties.com>

>>     <mailto:mfm at meyerprobateproperties.com>

>>     To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>

>>     <mailto:mbcoupes at mbcoupes.com>

>>     Sent: Monday, April 13, 2009 9:52:47 AM GMT -05:00 US/Canada Eastern

>>     Subject: Re: [W126 Coupe] Speedometer

>>

>>     I wonder if you developed a vacuum leak, sounds like a serious

>>     one if pegged all the way to the right.

>>      

>>     You can use a cheaper O2 sensor than stock, but it will mean some

>>     minor rewiring as opposed to plug and play.

>>      

>>     Markus Meyer

>>     mfm at meyerprobateproperties.com

>>     <mailto:mfm at meyerprobateproperties.com>

>>     www.meyerprobateproperties.com

>>     <http://www.meyerprobateproperties.com/>

>>     Meyer Probate & Properties, LLC

>>     484-919-9762

>>      

>>

>>      

>>

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

>>         Subject: Re: [W126 Coupe] Speedometer

>>         From: terrako at comcast.net <mailto:terrako at comcast.net>

>>         Date: Mon, April 13, 2009 9:46 am

>>         To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>

>>         <mailto:mbcoupes at mbcoupes.com>

>>

>>

>>         Hello, all.

>>          

>>         Can anyone assist? This weekend  the fuel economy meter stuck

>>         in the red position, all the way to the right? Can anyone

>>         tell me what the cuase and repaire for this is? Additionly my

>>         O2 light comes on periodcally, poor gas milage as a result,

>>         is there an option to replacing the O2 sensor with something

>>         other the expensive MB part?

>>          

>>         TS

>>

>>

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

>>         From: "THOMAS THEISEN" <tnstheisen at msn.com>

>>         <mailto:tnstheisen at msn.com>

>>         To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>

>>         <mailto:mbcoupes at mbcoupes.com>

>>         Sent: Sunday, April 12, 2009 6:20:45 PM GMT -05:00 US/Canada

>>         Eastern

>>         Subject: Re: [W126 Coupe] Speedometer

>>

>>         I just had my speedometer rebuilt by DNA Speedometers in

>>         Tampa, cost $129. and works great

>>         Tom 82 380 SEC

>>

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

>>             *From:* Mark La Rochelle

>>             <mailto:mark at burkhardtleitnerinc.com>

>>             *To:* mbcoupes at mbcoupes.com <mailto:mbcoupes at mbcoupes.com>

>>             *Sent:* Sunday, April 12, 2009 12:50 PM

>>             *Subject:* [W126 Coupe] Speedometer

>>

>>             Hi,

>>             The speedometer [and odometer] have started to cut in and

>>             out intermittently. Going over a bump can make it work

>>             again. Does anyone have any suggestions to fix the problem?

>>             Also, is it normal to have a vacuum swoosh of air when

>>             you remove the gas cap. Is the air pressure in the tank

>>             not equalized in some way?

>>

>>              

>>

>>             Mark

>>

>>              

>>

>>             91 560SEC

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>>

>>

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>>

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>

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