So I don't have the part numbers off hand but there are 2 different style lift pumps used on w123's. There is an early version that can't be rebuilt then a later style that we all know and can be rebuilt. I bought a spare one at pnp the newer style. I was wondering if anyone knows if the specifications of both are the same or is one say the newer style better? I figure there must have been a reason for Mercedes to change them but I can't find or figure why?

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