2005 MERCEDES-BENZ SPRINTER Service Repair Manual

NOTE: Check O-rings on solenoid valves for dam-
age and replace if necessary.
(6) Bend away retaining lug on stiffening rib on
transmission oil temperature sensor.
(7) Remove electrohydraulic control module (12)
from the shift plate (13).
(8) Note the locations of the major shift valve
group components for assembly reference (Fig. 114).
NOTE: Pay great attention to cleanliness for all
work on the shift plate. Fluffy cloths must not be
used. Leather cloths are particularly good. After dis-
mantling, all parts must be washed and blown out
with compressed-air, noting that parts may be
blown away.
(9) Unbolt leaf spring (5) (Fig. 115).
(10) Unscrew Torx bolts (1) (Fig. 115).
(11) Remove valve housing (2) from valve body (4)
(Fig. 115).
Fig. 113 Electrical Unit Components
1 - SOLENOID CAP
2 - SOLENOID CAP
3 - BOLT - M6X32
4 - BOLT - M6X30
5 - LEAF SPRING
6 - MODULATING PRESSURE REGULATING SOLENOID VALVE
7 - SHIFT PRESSURE REGULATING SOLENOID
8 - 3-4 SHIFT SOLENOID
9 - TORQUE CONVERTER LOCK-UP SOLENOID
10 - 1-2/4-5 SHIFT SOLENOID
11 - 2-3 SHIFT SOLENOID
12 - ELECTRICHYDRAULIC CONTROL MODULE
13 - SHIFT PLATE
Fig. 114 Shift Valve Group Locations
A - OPERATING AND LUBRICATING PRESSURE REGULATING
VALVES AND 2-3 OVERLAP VALVE
B - 1-2/4-5 SHIFT GROUP AND SHIFT, SHIFT VALVE, AND
REGULATING VALVE PRESSURE REGULATING VALVES
C - 3-4 SHIFT GROUP
D - 2-3 SHIFT GROUP, TCC LOCK-UP AND B2 REGULATING
VA LV E S
Fig. 115 Shift Plate Components
1-BOLTS-29
2 - VALVE HOUSING
3 - SEALING PLATE
4 - VALVE BODY
5 - LEAF SPRING
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ELECTROHYDRAULIC UNIT (Continued)

(12) Remove the strainers for the modulating pres-
sure and shift pressure control solenoid valves (Fig.
116) from the valve housing.
(13) Remove the strainer (1) (Fig. 117) in the inlet
to torque converter lock-up control solenoid valve.(14) Remove sealing plate (3).
NOTE: A total of 12 valve balls are located in the
valve body, four made from plastic (4) and eight
from steel (1, 3).
(15) Note the location of all check balls (1, 3, 4)
(Fig. 118) and the central strainer (2) for re-installa-
tion. Remove all check balls (1, 3, 4) and the central
strainer (2).
(16) Remove the screws holding the side covers to
the valve body and valve housing.
(17) Remove all valves and springs from the valve
body (1) (Fig. 119). Check all valves for ease of move-
ment and shavings.
NOTE: The sleeves and pistons of the overlap reg-
ulating valves must not be mixed up.
(18) Remove all valves and springs from the valve
housing (2) (Fig. 120). Check all valves for ease of
movement and shavings.
(19) Remove the pressure supply valve (1) (Fig.
121) from the valve body.
Fig. 116 Solenoid Valve Strainer Locations
1 - SOLENOID VALVE STRAINERS
Fig. 117 Converter Lock-up Solenoid Valve Strainer
Location
1 - CONVERTER LOCK-UP SOLENOID STRAINER
Fig. 118 Check Balls and Strainer Location
1 - STEEL CHECK BALLS
2 - CENTRAL STRAINER
3 - STEEL CHECK BALLS
4 - PLASTIC CHECK BALLS
5 - PLAIN DOWEL PIN
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ELECTROHYDRAULIC UNIT (Continued)

ASSEMBLY
NOTE: Pay great attention to cleanliness for all
work on the shift plate. Fluffy cloths must not be
used. Leather cloths are particularly good. After dis-
mantling, all parts must be washed and blown out
with compressed-air, noting that parts may be
blown away.(1) Install the pressure supply valve (1) (Fig. 122)
into the valve body.
(2) Install all valves and springs from the valve
body (1) (Fig. 123). Check all valves for ease of move-
ment and shavings.
NOTE: The sleeves and pistons of the overlap reg-
ulating valves must not be mixed up.
Fig. 119 Valve Body Components
1 - VALVE BODY 8 - SHIFT VALVE PRESSURE REGULATING VALVE
2 - 1-2/4-5 COMMAND VALVE 9 - B2 SHIFT VALVE
3 - 1-2/4-5 HOLDING PRESSURE SHIFT VALVE 10 - 2-3 HOLDING PRESSURE SHIFT VALVE
4 - 1-2/4-5 SHIFT PRESSURE SHIFT VALVE 11 - 2-3 COMMAND VALVE
5 - 1-2/4-5 OVERLAP REGULATING VALVE, SLEEVE, AND PISTON 12 - 2-3 SHIFT PRESSURE SHIFT VALVE
6 - SHIFT PRESSURE REGULATING VALVE 13 - TCC LOCK-UP REGULATING VALVE
7 - REGULATING VALVE PRESSURE REGULATING VALVE
VAAUTOMATIC TRANSMISSION - NAG1 21 - 95
ELECTROHYDRAULIC UNIT (Continued)

Fig. 120 Valve Housing Components
1 - 2-3 OVERLAP REGULATING VALVE, SLEEVE, AND PISTON 6 - 3-4 SHIFT PRESSURE SHIFT VALVE
2 - VALVE HOUSING 7 - 3-4 OVERLAP REGULATING VALVE, SLEEVE, AND PISTON
3 - SELECTOR VALVE 8 - OPERATING PRESSURE REGULATING VALVE
4 - 3-4 HOLDING PRESSURE SHIFT VALVE 9 - LUBRICATING PRESSURE REGULATING VALVE
5 - 3-4 COMMAND VALVE
Fig. 121 Pressure Feed Valve Location
1 - PRESSURE FEED VALVE
Fig. 122 Pressure Feed Valve Location
1 - PRESSURE FEED VALVE
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ELECTROHYDRAULIC UNIT (Continued)

(3) Install all valves and springs into the valve
housing (2) (Fig. 124). Check all valves for ease of
movement and shavings.
(4) Install the screws to hold the side covers to the
valve body and valve housing. Tighten the screws to
4 N´m (35 in.lbs.).
NOTE: A total of 12 valve balls are located in the
valve body, four made from plastic (4) and eight
from steel (1, 3).(5) Install all check balls (1, 3, 4) (Fig. 125) and
the central strainer (2).
(6) Install the strainer (1) (Fig. 126) in the inlet to
torque converter lock-up control solenoid valve.
Fig. 123 Valve Body Components
1 - VALVE BODY 8 - SHIFT VALVE PRESSURE REGULATING VALVE
2 - 1-2/4-5 COMMAND VALVE 9 - B2 SHIFT VALVE
3 - 1-2/4-5 HOLDING PRESSURE SHIFT VALVE 10 - 2-3 HOLDING PRESSURE SHIFT VALVE
4 - 1-2/4-5 SHIFT PRESSURE SHIFT VALVE 11 - 2-3 COMMAND VALVE
5 - 1-2/4-5 OVERLAP REGULATING VALVE, SLEEVE, AND PISTON 12 - 2-3 SHIFT PRESSURE SHIFT VALVE
6 - SHIFT PRESSURE REGULATING VALVE 13 - TCC LOCK-UP REGULATING VALVE
7 - REGULATING VALVE PRESSURE REGULATING VALVE
VAAUTOMATIC TRANSMISSION - NAG1 21 - 97
ELECTROHYDRAULIC UNIT (Continued)

Fig. 124 Valve Housing Components
1 - 2-3 OVERLAP REGULATING VALVE, SLEEVE, AND PISTON 6 - 3-4 SHIFT PRESSURE SHIFT VALVE
2 - VALVE HOUSING 7 - 3-4 OVERLAP REGULATING VALVE, SLEEVE, AND PISTON
3 - SELECTOR VALVE 8 - OPERATING PRESSURE REGULATING VALVE
4 - 3-4 HOLDING PRESSURE SHIFT VALVE 9 - LUBRICATING PRESSURE REGULATING VALVE
5 - 3-4 COMMAND VALVE
Fig. 125 Check Balls and Strainer Location
1 - STEEL CHECK BALLS
2 - CENTRAL STRAINER
3 - STEEL CHECK BALLS
4 - PLASTIC CHECK BALLS
5 - PLAIN DOWEL PIN
Fig. 126 Converter Lock-up Solenoid Valve Strainer
Location
1 - CONVERTER LOCK-UP SOLENOID STRAINER
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ELECTROHYDRAULIC UNIT (Continued)

(7) Position the sealing plate (3) onto the valve
body (4) (Fig. 127).
(8) Install the valve housing (2) onto the valve
body (4) and sealing plate (3).
(9) Install the shift plate Torx bolts (1) (Fig. 127).
Tighten the bolts to 8 N´m (71 in.lbs.).
(10) Install leaf spring (5) (Fig. 127).
(11) Install the strainers for the modulating pres-
sure and shift pressure control solenoid valves (Fig.
128) into the valve housing.(12) Install the electrohydraulic control module
(12) onto the shift plate (13) (Fig. 129).
(13) Bend the retaining lug on stiffening rib on
transmission oil temperature sensor to retain the
electrohydraulic control module.
(14) Install the solenoid valves (6 - 11) into shift
plate (13).
NOTE: Check O-rings on solenoid valves for dam-
age and replace if necessary.
(15) Install the leaf springs (5).
(16) Install the Torx socket bolts (3, 4) (Fig. 129).
Tighten the bolts to 8 N´m (71 in.lbs.).
NOTE: Pay attention to the different lengths of the
Torx socket bolts.
(17) Install the solenoid caps (1, 2).
(18) Install the electrohydraulic unit into the vehi-
cle.
Fig. 127 Shift Plate Components
1-BOLTS-29
2 - VALVE HOUSING
3 - SEALING PLATE
4 - VALVE BODY
5 - LEAF SPRING
Fig. 128 Solenoid Valve Strainer Locations
1 - SOLENOID VALVE STRAINERS
Fig. 129 Electrical Unit Components
1 - SOLENOID CAP
2 - SOLENOID CAP
3 - BOLT - M6X32
4 - BOLT - M6X30
5 - LEAF SPRING
6 - MODULATING PRESSURE REGULATING SOLENOID VALVE
7 - SHIFT PRESSURE REGULATING SOLENOID
8 - 3-4 SHIFT SOLENOID
9 - TORQUE CONVERTER LOCK-UP SOLENOID
10 - 1-2/4-5 SHIFT SOLENOID
11 - 2-3 SHIFT SOLENOID
12 - ELECTRICHYDRAULIC CONTROL MODULE
13 - SHIFT PLATE
VAAUTOMATIC TRANSMISSION - NAG1 21 - 99
ELECTROHYDRAULIC UNIT (Continued)

INSTALLATION
(1) Position the electrohydraulic unit in the trans-
mission housing.
(2) Insert selector valve (1) (Fig. 130) in driver of
detent plate (2). When installing the electrohydraulic
control module in the transmission housing, the plas-
tic part of the selector valve (1) must engage in the
driver of the detent plate (2).
(3) Install the Torx socket bolts (3) (Fig. 131) and
torque to 8 N´m (71 in.lbs.).
(4) Install a new oil filter (4) (Fig. 131).
(5) Install oil pan (5) (Fig. 131) and torque the oil
pan bolts to 8 N´m (71 in.lbs.).
(6) Install the oil drain plug (8) (Fig. 131) with a
new drain plug gasket (9). Torque the drain plug to
20 N´m (177 in.lbs.).
(7) Install the guide bushing (2) (Fig. 131) into the
transmission housing and install the bolt to hold the
guide bushing in place.
(8) Check O-ring on plug connector (1) (Fig. 132),
and replace if necessary.
(9) Install the plug connector (1) into the guide
bushing (2). Turn bayonet lock of guide bushing (2)
clockwise to connect plug connector (1).
(10) Position the heat shield (2) (Fig. 133) onto the
transmission housing and install the screw (1) and
bolt (3) to hold the shield in place.
(11) Check oil level in automatic transmission, or
add oil.
Fig. 130 Connect The Selector Valve To The Detent
Plate
1 - SELECTOR VALVE
2 - DETENT PLATE
Fig. 131 Remove Electrohydraulic Unit
1 - HEAT SHIELD
2 - ELECTROHYDRAULIC UNIT
3 - BOLT
4 - OIL FILTER
5 - OIL PAN
6 - CLAMPING ELEMENT
7 - BOLT
8 - DRAIN PLUG
9 - DRAIN PLUG GASKET
10 - 13-PIN PLUG CONNECTOR
11 - BOLT
12 - GUIDE BUSHING
Fig. 132 Install Wiring Connector Plug
1 - PLUG CONNECTOR
2 - GUIDE BUSHING
21 - 100 AUTOMATIC TRANSMISSION - NAG1VA
ELECTROHYDRAULIC UNIT (Continued)