Yes, depending on the size of the car dealership a service manager should have basic car knowledge.

However the bigger the dealer....the less they really know!

You can buy a nice filling system from AST tools for just over $200.
All newer MB's have that trans & REQUIRE trans service every 40K miles.

Takes less than an hour to service!

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator