Well this cooling problem is done,and embarassing also.
Turns out thermostat was sticking closed.This new stat,puchased before head gasket repair was the culprit.
This part was pulled and checked 3 times.First before head gasket repair and it was open all the way.only ran it for about3 minuites ,did not boil coolant.
Second time after head repair it was open about half way when it was checked.OK for the temp of coolant at the time.
Third time it was slammed shut and also binding on the shaft really bad.
Took it out and ran without stat and car ran really cool.So bad stat.
Did put a new one in with Benz coolant and now runs just right/
So i wonder if it was closed when i checked it the second time and popped open when i unbolted the thermostat housing, fooling me into thinking it worked.
Well its done anyway.So the whole question here is do M103 AND M104'S have bad impellers.Looks to be NO.
Also i bought a new nissen radiator and it looks just like the aftermarket one.Looks to be from the same company.Thanks for all the help,Rich

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88 300E White, sold 9-04
88 190E Black 2.3 sold
90 300CE White, Grey sold 12-24-04
92 400E White,Grey Sold 5-06
90 300CE 91K Signal Red,Black Sold 2007
1989 300CE Smoke silver,Tan Sold 1-08
1993 300E 3.2 M104 motor
1991 300CE White,Grey
1994 E420 beautiful car,gone to new home
1994 E320 Smoke an Parchment.Beautiful car