JB:

I do not know what yr. your 560SL is. Out of curiosity, I looked up the FPR here for an '87 model.

The URL below shows 2 different FPRs - one is 10 pin; the other has fewer pins. I wonder if you were sold the correct FPR?

http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1EQ0PTV2S1S50VULBU&year=1987&make=MB&model=560-SL-001&category=P&part=Fuel+Pump+Relay

__________________
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"