[W126 Coupe] Engine stumbles, antenna chews the antenna mast

[Iain Gunn]

The antenna, I can't remember what's in it, been a while since I had one apart, but there is a switch/switches inside that trigger an open circuit when the antenna reach's its limits open and closed. Some use a small micro switch that gets hit when the reel reach's furthest close and open, the reel carrier has a spring loaded pivot that when the cable is retracted, or extended, it pivots and hits the switch, cutting the power, through a set of small relays.

Was the electrical connection plug and play or did you have to mess with the wiring? Did you connect the antenna wire from the new system? I suggest that you bench the antenna, I'd be surprised if the mast is too short, because it doesn't matter as the cable reach's its limits and ratchets up the reel carrier. Do you have the electrical schematic? It will show you what each one of the wire does.
  ----- Original Message ----- 
  From: Day . Ralph 
  To: Mercedes Coupes Mailing Lists 
  Sent: Sunday, May 10, 2009 9:20 AM
  Subject: Re: [W126 Coupe] Engine stumbles, antenna chews the antenna mast


  Axel,

   

  Sounds like the antenna may be too short.

   

  The stumble sounds like what I experienced with both my 84 500SEC and 91 560SEC.  This happened when each of the cars had about 150K miles.  We never found the problem, but suspect the vacuum line to the transmission.

   

  Ralph D. Day

  Senior Program Manager/ASQ LSS Certified Black Belt

  MDA Master Black Belt

  Dynamics Research Corporation

  (301) 275-9030 (cell)

   

  From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com] On Behalf Of Axel Wulff
  Sent: Saturday, May 09, 2009 9:46 PM
  To: mbcoupes at mbcoupes.com
  Subject: [W126 Coupe] Engine stumbles, antenna chews the antenna mast

   

  Hi everyone,
   
  I'm still doing battle with the audio make-over I embarked on about six months ago. It is coming along and I have CD/DVD and iPod sound again for the first time since December.
   
  I changed out the antenna mast with one I picked up at the local (Devon, PA) MB dealership. I got the old one out without a hitch and the new one went in fairly smoothly as well.
   
  The first sign of trouble was that the new mast did not rise after the installation.
   
  I got it to go up and retract, but every time it goes down, the motor continues to spin after the mast is fully retracted and makes an infernal noise spinning against the nylon rope.
   
  Anyone got an idea of what is going on?
   
  Also, my M119 engine has developed a pronounced stumble. I happens when the engine has not fully warmed up and when applying the throttle after idling.
   
  I strongly favor a fuel over spark as the cause, but am open to ideas about what solutions to try.

  Regards,
  Axel J. Wulff
  610-731-5453 Cellular
  610-572-4611 Home






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