The folks in parts shop don't sell inferior stuff. Most of their MB parts are from the same manufacturers that MB gets their stuff from. Additionally, they can get you ones that say MB on the package if that's what you want.

Good luck,

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Larry Bible
'84 Euro 240D, 523K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in
Mercedes automobiles