I thought the dig on the aftermarket was 2 fold:

1) If a MB rebuilt pump is available, it's cheaper
2) MB will do the R&R if it leaks ?? 2 years. Depending on the car, it can be a fair amount of effort.

I've heard sometimes, the impeller on aftermarket cars maybe different or located incorrectly and insuing hot running engines result.


Michael

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Michael McGuire
83 300d
01 vw A4 TDI
66 Chevy Corsa
68 GMC V6 w/oD
86 300E