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26–05 Mercedes-Benz
Transmission Fluid
Changing and Magnetic
Plug Cleaning
Draining
1. Park the vehicle on a level surface. Apply the
parking brakes and chock the rear tires.
NOTE: Drain the transmission fluid while the
transmission is warm.
2. Drain the transmission fluid. See Fig. 10.
2.1 Remove the magnetic drain plug from the
bottom of the gear case.
2.2 Discard the aluminum gasket.
2.3 Catch the transmission fluid in a suitable
container and dispose of it properly.
3. Clean the area around the fill plug.
4. Remove the fill plug from the side of the case.
Discard the aluminum gasket.
NOTE: Use a piece of key stock, or any other
convenient steel slug, to short the two magnetic
poles and divert the magnetic field.
5. Clean the magnetic drain plug before installing it.
6. Install the drain plug (p/n A 124 997 01 32) and a
new aluminum gasket (p/n N 00763 024105).
Tighten the drain plug 42 lbf·ft (57 N·m).
Filling
CAUTION
Operating a manual transmission with the fluid
level higher or lower than recommended can re-
sult in transmission damage. Do not overfill the
transmission; overfilling will force fluid out of the
case through the main shaft openings. Fluid over-
flow may also drain onto the clutch or clutch
brake, causing additional problems.
1. Add transmission fluid until it is level with the
lower edge of the fill opening. See Fig. 10 for
location of the fill plug and Fig. 11 for correct
level. See Table 5 for approved transmission lu-
bricants and Table 6 for lubricant capacities.
MBT Transmission Lubricant Types
Manufacturer Type
Mobil Mobiltrans SHC
®
DC
Table 5, MBT Lubricant Types
MBT Transmission Lubricant Capacities
Transmission Model
Refill Capacity
*
:
quarts (liters)
MBT660S-6O 9.5 (9.0)
MBT520S-6D 9.5 (9.0)
*
Quantities listed are approximate. Fill the transmission until the lubricant
is level with the bottom of the fill hole, with the vehicle in normal operating
position.
Table 6, MBT Lubricant Capacities
05/22/2001
f261102
1
2
3
NOTE: The transmission is shown from the left-hand
side.
1. Transmission
2. Fill Plug
3. Drain Plug
Fig. 10, MBT Drain and Fill Plugs
f260006b
10/05/94
A
B
A. Full B. Low
Fig. 11, MBT Fluid Level Checking
Transmission 26
Acterra Maintenance Manual, March 2005 26/11