I think I found the info on the pump up front... It looks like it is the "Charge Air Cooler Circulation Pump". But, that is not the item I was questioning, This device is located on the front edge of the driver side wheel well inside the engine compartment and is a round black pump looking device that has the Bosch part number 0580000021 stamped on it... But if I recall correctly, there is a Mercedes Benz part # also stamped on it... That is the number I need to identify the part since Bosch US has no info on this part...

Thanks in advance Jody...