I believe this is an OEM replacement waterpump, normally $460 on sale for $76.88
http://www.autohausaz.com/pn/1122001501

Also, here's a MB part from a dealer for $165
https://www.mbwholesalepartsonline.c...0200%2015%2001

Personally, I'd spend the $165 and get the Mercedes part. Crazy that the same Chrysler Mopar part is $700-900.
It's the same part number in another post:
Provided by: onehundred80


Water Pump
Mercedes part#112 200 1501
Chrysler part# 05097159AC ?
or #05097158AA ?
Bosch part# 99176