[W126 Coupe] 1988 560 SEC loss of power

[GreyGarageRuss at aol.com]

I had to leave town (Toronto) quickly last week to attend a funeral in  
Montreal (325 miles away).  I went to my mechanic and asked if he had a  fuel 
pump relay for my car.  He had one (not MB brand) and sold it to  me ($160.00 
Cdn).  It was numbered 003 545 24 05 (same number as the MB  branded part 
already in the car???). I took it with me and headed for  Montreal...1 hour & 
40 minutes later the car did it's thing and lost  power.  I confidently put 
in the "new" FPR and the car wouldn't  even start.  I waited 10 minutes and 
put in the old part.  1  hour and 40 minutes later it did the same 
thing....I finally got to Montreal and  looked up a MB dealer.  He indicated that he 
had a MB replacement for  #  003 545 24 05 for $250.00 than looked at his 
records and said that this  part number (which was in the car) was the wrong 
number.  He gave me an  identical looking part # 003 545 25 05 at a cost of  
$70.00.  This is the same number that Shin mentioned last week.  This  part 
got me around Montreal and back home without a hitch.
So thanks to Shin and all others who provided me with advise on my  
problem...it appears to be solved!!
ps.  I got back my original $160.00
 
 
Date: Wed, 23 Sep 2009 17:07:14 EDT
From:  GreyGarageRuss at aol.com
Subject: [W126 Coupe] 1988 560 SEC loss of  power
To: mbcoupes at mbcoupes.com

I  follow this list daily and now  have a problem with my 1988 560 SEC 
which 
I could  use some advice  on.  Twice in the  last two weeks while driving 
my 
car lost  power.  Each time the trips were at highway  speeds and after  
about 1-1/2 hours of driving.  On each occasion, the fuel gage  was  close 
to the 
?R? (reserve tank ) level. The car lost most of its  power (like  running 
on 4 cylinders) but did not stall.  I was  able to get over to the curb 
lane 
at about 15-20 mph.  I turned the  ignition off  each time, waited 4-5 
minutes 
and  restarted?.it  then ran fine. 
I have  had two mechanics look at it but no  solution.  Both suggested fuel 
supply problems but  the two fuel  pumps were checked and appeared to be 
functioning properly.  They also  suggested a fuel sensor  problem but were 
unable to check sensor while  problem was not  happening. 
Other  suggestions included: blockage  in muffler system or catalytic  
converter! 
Any  advice would  be appreciated. 
Russell

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