[W126 Coupe] Fuel Requirements or How Can I Adjust 1989 560 SECTo Use 87 Octane

mavris2 at comcast.net mavris2 at comcast.net
Thu Apr 27 19:30:21 EDT 2006


Why cant one just add octane boost to the fuel?  They have stuff for 5bucks that claim a 10 point increase in octane.  Any thoughts??


----- Original Message ----- 
  From: Dan Landiss 
  To: Mercedes Coupes Mailing Lists 
  Sent: Thursday, April 27, 2006 3:08 PM
  Subject: Re: [W126 Coupe] Fuel Requirements or How Can I Adjust 1989 560 SECTo Use 87 Octane


  XKEOTS at aol.com wrote: 
    Is there any way to make our 560's run or 87 octane?


  There is a 750 ohm resistor (US models) inside a black plug in the wiring harness up near the brake booster. It contributes to the computer's decision on spark advance. For other markets, an adjustment can be made as follows:

        Setting Ohms Retard Octane 
        S 10000 0 98 
        2 2400 2 95 
        N 1300 4 93 
        4 750 6 91 
        5 470 8 89 
        6 220 10 87 
        7 0 
       
       

  But I gotta tell ya', with 470 ohms in there it is going to feel sluggish!

-- 

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