I purchased the extended warranty for my 2000 ML320 (62K miles) and have suffered with hard shifting which the local dealer says is a control unit (item on order).

To replace the control unit, do they need to drain the fluid?

I know the fluid is lifetime, but I'm thinking of having them change the fluid and filter while they have it on the lift. If the fluid is changed during the repair then I can save my $$ for other stuff that isn't covered. (Those plastic trim bits cost more than chrome for the bike?!?)

Thanks in advance.
Rob

The control unit is inside the truck above the gas pedal!

Don't listen to the lifetime fill "BS"! have the fluid & filter changed.

Iwould have them use the NEW fluid designed for the 7 speed trans! Will help with shifting problems. IT is $$$ at $18 a liter but much cheaper than a $4000. transmission!!!!

__________________
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

Thank you. Fresh fluid is always a good thing in my book.