MB has their OWN casting company..not available thru any aftermarket..only OE thru dealers.

However the interernals..like the bearing & seals are made by INA & at least 2 aftermarket water pump makers (Graf & Sil) use that bearing & seal assembly.

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MERCEDES Benz Master Guild Technician (6 TIMES)
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1986 190E 2.3 16V 2.5 (sold)
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