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

[Shayegan, Richard]

Does anybody know if that resistor exists on pre-1986 cars (i.e. CIS not
CIS-E)? Or is our only option to get out the allen key socket and rotate
the distributor?
Thanks,
Richard

________________________________

From: mbcoupes-bounces at mbcoupes.com
[mailto:mbcoupes-bounces at mbcoupes.com] On Behalf Of Dan Landiss
Sent: Thursday, April 27, 2006 4:08 PM
To: Mercedes Coupes Mailing Lists
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!

-- 

=-=-=-=-=-=-=-=-
"Progress is brought about by doubt, not accord."  --John Amos Comenius,
17th century educator
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