Hi,
Does anyone have the harness wiring diagram of the car S420 1994? Would you please, post or email this to dinh_hai_tran@yahoo.com. I have a very strange problem as I posted earlier on the auxilliary fan on all the time. After I checked the new engine harness which new part number is: 140 540 1132 on the tag and the part number printed on the harness is 000 545 4881. I called MB dealer, the person who answer the phone said the earlier part number (000 ...) is not on his computer anymore. But the point is that... the pin out new part number (140 ...) is not the same as the old one. I traced from old part number from AC temperature sensor to the computer go to pin number 6 (brown) and 7 (blue) while the new harness go to pin 5 (brown) and 31 (red). This makes my fan on all the time. I'm afraid that if I order another one, it will be just the same as the one I installed. Please, if you have this diagram, I would like to test pin to connector before I purchase.
Thank you very much,

Does your VIN match this ?

http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=23I0RAMEE24318WC7L&year=1994&make=MB&model=S-420-001&category=R&part=Climate+Control+Unit

Yes, the last 7 digits of my VIN is A159980. I hope this is enough
Thanks,

EPC gives 140 540 11 32 as a harness from 1993 for s420.
p/n 000 545 48 81 is for the black connector only, and not for the harness. Did you take this connector apart? How do you know the wire colors on pins in this connector?
Mike

Yes, I take everything apart... I even want to strip the wire skin to see what's inside the insulation... As I stated the part number 000... that's what I read from the harness... the rubber with MB sign and the number beside that and 140... is what I see from the tag. The tag, I means add on... just like price tag when you buy your jeans...

You still have the old harness ??
What is the tag # on That?