[W126 Coupe] New to the list ...

[Shayegan, Richard]

The heat issue I'm guessing is the monovalve. That's like a 5 minute
fix. I have circled it in this photo
http://Davidson.smugmug.com/photos/142891997-L.jpg Buy a repair kit,
open it, replace the internals, close it (do this on level ground or
you'll lose like 6 cups of coolant).

On the miss, with 183k miles it could also be timing chain stretch (I
know on my 380 when the timing chain stretched it started to run like
the distributor was shot)
Richard 


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

> From: mbcoupes-bounces at mbcoupes.com 

> [mailto:mbcoupes-bounces at mbcoupes.com] On Behalf Of DERRICK SCHMIDT

> Sent: Wednesday, April 11, 2007 1:18 AM

> To: Mercedes Coupes Mailing Lists; Mercedes Coupes Mailing Lists

> Subject: [W126 Coupe] New to the list ...

> 

> ... but know how they work.  Have had a Sunbeam Tiger for some time.

> 

> Just inherited my parents' '83 500 SEC.  White with Navy blue 

> leather interior.  

> Beautiful car.  They grey marketed it from Germany in '84.  

> Drove it myself @ 150 mph in Germany.  Dad has taken great 

> care of the car over all.  Looks absolutely perfect from 

> about 10 feet, but now has 183 k miles and a few issues.

> 

> Two at the top of the list:

> 

> Have not chekced the obvious (distributor, etc) yet, but it 

> has a very noticeable miss at idle.  Just drove it from L.A. 

> to Sacramento and still pulled from 85 to 110 pretty well.  

> Any thing else to check?  Plug wires look pretty new.  Will 

> check the plugs themselves as well.

> 

> Also, it seems the heater core is open to hot water.  Can 

> minimize the heat into the cabin by running fresh air through 

> the dash vents but temperatures spend a significant amount of 

> time in the triple digits here so I need to get the heat to stop.

> 

> Any starting points would be appreciated.

> 

> Thanks.

> 

> Derrick 

> 

> 

> 

> 

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