Originally Posted by
HPMotors1
Ya got me there - I'm only going by what is in the manual. However, reading the text, they appear to perform separate functions - as I understand it the filter check valve is part of the regulator assembly.
Right now I am trying to determine if the Bosch unit is equivalent to the MB - is it the original part supplier? The amazing interweb has a MB pump for about $500, a Bosch for $189 and some no name for $39. Heck of a range. Right now I am leaning toward the Bosch pump. In the mean time I am cycling the key to prime the system and reduce starter wear and tear.
HP
Look at the fuel pump on your car, it will have the Mercedes part number and the makers name and possibly their part number. My guess it is a Bosch part.