WTB Diesel water pump pulley Part #6032050110
 

This pulley is a bit smaller than the stock om603 water pump pulley so it speeds up coolant flow at lower rpm's. Dm me if you have one!

The e300 with om606 used this pulley as well as 350sd + s350.

Part # 6032050110

Thanks, Jon

From my research, the 300E 2.5s also have these. I found this out because I too need one. Hopefully it will help your search a bit. :)

Om603 pulley
 

Do you mean 300e 2.6 gas engine? Or the 300d 2.5 diesel engine? The 2.5 om602 does use that pulley and it is the same part # I list above. If you found separate part # that's different from the one I posted please send it to me.
Thanks for the help!

Diesel, sorry about the typo. E and D are beside each other!