>

But there is still a serial # range for the auto ones [ 12], so you still have to use the serial # to determine the correct part.

Do you see the question they ask you when you go to look up the part??

http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=2AO123CS42CA0T61CZ&year=1988&make=MB&model=300-TE-001&category=C&part=Water+Temp.+Sensor

If you still find this confusing, then you may just want to call Phil @ FastLane and give him the chassis/yr/engine # and he will surely send you the correct part.

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A Dalton