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Home >> Mercedes Benz >> 2025 >> S580 >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Automatic Transmission (1 Of 2) -- 223 Chassis >> Testing & Repair >> Remove/Install Automatic Transmission >> Remove/Install Automatic Transmission - AR27.10-P-0005S

Remove/Install Automatic Transmission - AR27.10-P-0005S

Transmission 725.1 in model 223 with engine 176, 

MODIFICATION NOTES

07.11.2023 Screw/nut, transmission to engine   BA27.10-P-1001-04H
G16244333Courtesy of MERCEDES-BENZ USA
G16244334Courtesy of MERCEDES-BENZ USA
G16244335Courtesy of MERCEDES-BENZ USA
DANGER Risk of death  caused by vehicle slipping or toppling off of the lifting platform. Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer. AS00.00-Z-0010-01A
WARNING Risk of injury.  Moving parts can pinch, crush or, in extreme cases even sever extremities. No parts of the body or limbs should be within the operating area of mechanical components when moving components. AS00.00-Z-0009-01A
WARNING Risk of injury.  Skin or eye injuries may result when handling hot or glowing objects. Wear protective gloves, protective clothing and safety glasses, if necessary. AS00.00-Z-0002-01A
CAUTION Risk of injury  to skin and eyes due to handling of transmission oil. Health risk caused by swallowing transmission oil Wear protective gloves, protective clothing and safety glasses.
Do not pour transmission oil into beverage bottles.		 AS00.40-Z-0001-01A
CAUTION Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.		 AS00.00-Z-0017-01A
Notice  Notes on threaded connections fastened using a tightening angle-based tightening process   AH00.00-P-0020-01A
Notice  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
Notice  Notes on self-locking nuts and bolts   AH00.00-P-0001-01KOA
  Notes on automatic transmission   AH27.19-P-0001-01NKB 
REMOVING Remove     
1 Secure vehicle to prevent it moving away.    
2 Shift the transmission (1) into neutral position.    
3 Release parking brake.    
4 Disconnect ground line from battery. IMPORTANT The 48 V on-board electrical system is automatically disconnected from power supply at the latest 10 s after disconnecting the ground line from the 12 V on-board electrical system battery. AR54.10-P-0051S
5 Secure vehicle on vehicle lift.   AR00.60-P-1006A
6 Drain coolant for low-temperature coolant circuit.   AR20.00-P-1144SC
7 Remove bracket (6).    
8 Remove coolant lines of drive unit from drive unit, from oil cooler and from front axle carrier at rear.   AR08.50-P-0244S
9 Remove propeller shaft.   AR41.10-P-0050S
10 Remove electrical wiring harness (3) from heat shield (2) and remove heat shield (2).   AR27.40-P-0700-01S 
11 Release and disconnect electrical connector of transmission (1).    
12 Release and disconnect electrical connector (4) and fasten electrical wiring harness (3) outside of working area.    
13 Remove left and right catalytic converter from exhaust gas turbochargers and brackets and expose. Right catalytic converter AR49.20-P-0102S
    Left catalytic converter
IMPORTANT Expose catalytic converters far enough so that they can be turned outwards in the transmission tunnel.		 AR49.20-P-0101S
14 Detach brackets (9) from transmission (1).    
15 Detach front axle differential propeller shaft from front axle differential. IMPORTANT Remove front axle differential propeller shaft together with transmission (1). AR41.10-P-0070SC
16 Remove nuts (5) of 48 V electrical wiring harness from underbody.    
17 Remove the bolt (10).    
18 Remove screws (11).    
19 Remove holder (20) from crankcase.    
20 Remove screws (12).    
21 Remove nuts (7) and remove 48 V electrical wiring harness from transmission (1) and underbody.    
22 Remove cover (8).    
23 Remove rotor (13) from drive plate (16). NOTES Do not use an impact wrench or compressed air tool to remove the bolts.
Otherwise, the threaded union (17) in the drive plate (16) will be damaged as a consequence.		 AR08.10-P-0023-01EWO
    SPECIAL TOOL Ring wrench Fig 2
    SPECIAL TOOL Long wedge Fig 1
24 Support transmission (1) with major-assembly support and mounting plate and strap down securely.    
REFER TO SPECIAL TOOLS 000 588 24 62 00 Major assembly mount   WS01.00-P-0253B
REFER TO SPECIAL TOOLS 000 588 23 62 00 Mounting plate   WS26.00-P-0415B
25 Remove transmission mount from underbody. NOTES Never use an impact wrench or compressed-air tool to remove the screws.
Otherwise the consequence is damage to the thread.		 AR22.10-P-0007SC
26 Lower transmission (1) until the screws (18) can be removed.    
REFER TO SPECIAL TOOLS 000 588 24 62 00 Major assembly mount   WS01.00-P-0253B
REFER TO SPECIAL TOOLS 000 588 23 62 00 Mounting plate   WS26.00-P-0415B
27 Prop up engine at front between front axle carrier and engine using wooden wedge.    
28 Remove bracket (19) from crankcase.    
29 Remove screws (18).    
30 Turn catalytic converters in transmission tunnel outwards and remove transmission (1).    
REFER TO SPECIAL TOOLS 000 588 24 62 00 Major assembly mount   WS01.00-P-0253B
REFER TO SPECIAL TOOLS 000 588 23 62 00 Mounting plate   WS26.00-P-0415B
31 Remove corrosion from crankshaft. IMPORTANT Use an emery cloth to remove corrosion.  
    Assembly cleaner *BR00.45-Z-1028-04A 
32 Check threaded unions (17) in drive plate (16). If problems are found,
↓
Install new drive plate (16).
Transmission 725.1 in model 223 with engine 176		 AR03.30-P-8003SC
33 Remove seal (15) between transmission (1) and timing case cover.    
34 Remove pilot bushing (14).   AR08.10-P-0026-01EWO
    SPECIAL TOOL Counterholder Fig 3
INSTALLING Install     
35 Install pilot bushing (14). IMPORTANT Replace pilot bushing (14).
IMPORTANT To make it easier to mount the transmission (1), grease the pilot bushing (14) at the plastic.		 AR08.10-P-0026-01EWO
    Long-life grease *BR00.45-Z-1001-06A 
    TORQUE SPECIFICATION Screw, pilot bushing to rotor *BA27.10-P-1034-04H 
    SPECIAL TOOL Counterholder Fig 3
36 Position seal (15) between transmission (1) and timing case cover. IMPORTANT Replace seal (15).  
37 Turn catalytic converters in transmission tunnel outwards and install transmission (1).    
REFER TO SPECIAL TOOLS 000 588 24 62 00 Major assembly mount   WS01.00-P-0253B
REFER TO SPECIAL TOOLS 000 588 23 62 00 Mounting plate IMPORTANT While doing so, align the bores of the rotor (13) with the threaded unions (17) in the drive plate (16). WS26.00-P-0415B
38 Screw in bolts (18). TORQUE SPECIFICATION Screw/nut, transmission to engine *BA27.10-P-1001-04H 
39 Attach bracket (19) to crankcase. TORQUE SPECIFICATION M6x1 *BA00.10-P-1002-04A 
40 Remove wooden wedge at front between front axle carrier and engine.    
41 Lift transmission (1) and attach transmission mount to underbody. NOTES Never use an impact wrench or compressed-air tool to screw in the screws.
Otherwise the consequence is damage to the thread.		 AR22.10-P-0007SC
42 Unfasten strapping from transmission (1) and lower major-assembly support and mounting plate.    
REFER TO SPECIAL TOOLS 000 588 24 62 00 Major assembly mount   WS01.00-P-0253B
REFER TO SPECIAL TOOLS 000 588 23 62 00 Mounting plate   WS26.00-P-0415B
43 Attach rotor (13) to drive plate (16). NOTES Do not use an impact wrench/driver or compressed air tool to screw in the bolts. Otherwise, the threaded union (17) in the drive plate (16) will be damaged as a consequence. AR08.10-P-0023-01EWO
    TORQUE SPECIFICATION Screw, torque converter/rotor to drive plate/star-shaped drive plate *BA27.20-P-1001-01D 
    SPECIAL TOOL Ring wrench Fig 2
44 Install cover (8).    
45 Position 48 V electrical wiring harness at transmission (1) and underbody and attach nuts (7). TORQUE SPECIFICATION Nut, 48 V subharness to refrigerant compressor/electric motor/firewall *BA15.18-P-1004-03D 
46 Screw in screws (12). TORQUE SPECIFICATION 48 V subharness to oil pan/engine carrier/crankcase *BA15.18-P-1001-03D 
47 Attach holder (20) to crankcase. TORQUE SPECIFICATION M6x1 *BA00.10-P-1002-04A 
48 Screw in screws (11). TORQUE SPECIFICATION Screw, cable duct to transmission bell housing *BA27.10-P-1029-04H 
49 Screw in screw (10). TORQUE SPECIFICATION Screw, ground line to drive unit housing *BA15.18-P-1006-03D 
50 Attach nuts (5) of 48 V electrical wiring harness to underbody. TORQUE SPECIFICATION Nut, 48 V subharness to body *BA15.18-P-1005-03D 
51 Attach front axle differential propeller shaft at front axle differential.   AR41.10-P-0070SC
52 Attach brackets (9) to transmission (1). TORQUE SPECIFICATION Screw, Exhaust system bracket to transmission *BA49.10-P-1004-02Y 
53 Attach left and right catalytic converters to exhaust gas turbochargers and brackets. Right catalytic converter AR49.20-P-0102S
    Left catalytic converter AR49.20-P-0101S
54 Release attachment on electrical wiring harness (3) then connect and lock electrical connector (4).    
55 Connect and lock electrical connector of transmission (1).    
56 Install heat shield (2) and attach electrical wiring harness (3) to heat shield (2).   AR27.40-P-0700-01S 
    TORQUE SPECIFICATION Screw, heat shield to transmission *BA27.10-P-1033-04H 
57 Install propeller shaft.   AR41.10-P-0050S
58 Attach coolant lines of drive unit to drive unit, to oil cooler and to front axle carrier at rear.   AR08.50-P-0244S
59 Install bracket (6).    
60 Add coolant for low-temperature coolant circuit. IMPORTANT Only install lower engine compartment paneling after leak test. AR20.00-P-1144SC
61 Connect ground line to battery.   AR54.10-P-0051S
62 Check and correct transmission oil level.   AR27.00-P-0270EWN 
63 Read out and delete fault memory.    
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-06FR
64 Perform transmission adaptation with vehicle diagnosis system. After replacement or repair of transmission (1).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-06FR
WARNING Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. AS00.00-Z-0005-01A
65 Perform engine test run and check transmission (1) for leak tightness and proper operation.    
66 Install lower engine compartment paneling.   AR61.20-P-1105S
67 Lower and release vehicle with vehicle lift.   AR00.60-P-1006A
METRIC SCREWS/BOLTS AND NUTS AS PER MBN 10 105, 10 143

Number Designation 8.8 10.9
BA00.10-P-1002-04A M6x1 Nm 9 13
48V ON-BOARD ELECTRICAL SYSTEM SUBHARNESS

Number Designation Engine 176 in model 223
BA15.18-P-1001-03D 48 V subharness to oil pan/engine carrier/crankcase Nm 8
48V ON-BOARD ELECTRICAL SYSTEM SUBHARNESS

Number Designation Engine 176 in model 223
BA15.18-P-1004-03D Nut, 48 V subharness to refrigerant compressor/electric motor/firewall Nm 16
48V ON-BOARD ELECTRICAL SYSTEM SUBHARNESS

Number Designation Engine 176 in model 223
BA15.18-P-1005-03D Nut, 48 V subharness to body Nm 8
48V ON-BOARD ELECTRICAL SYSTEM SUBHARNESS

Number Designation Engine 176 in model 223
BA15.18-P-1006-03D Screw, ground line to drive unit housing Nm 20
AUTOMATIC TRANSMISSION COMPLETE

Number Designation Transmission 725.1
BA27.10-P-1001-04H Screw/nut, transmission to engine Nm 42
AUTOMATIC TRANSMISSION COMPLETE

Number Designation Transmission 725.1
BA27.10-P-1029-04H Screw, cable duct to transmission bell housing Nm 12
AUTOMATIC TRANSMISSION COMPLETE

Number Designation Transmission 725.1
BA27.10-P-1033-04H Screw, heat shield to transmission Nm 8
AUTOMATIC TRANSMISSION COMPLETE

Number Designation Transmission 725.1
BA27.10-P-1034-04H Screw, pilot bushing to rotor M10 Stage 1 Nm 55
Stage 2 ∠° 90
TORQUE CONVERTER

Number Designation Transmission 725.0/1
BA27.20-P-1001-01D Screw, torque converter/rotor to drive plate/star-shaped drive plate Angled threaded connection Stage 1 Nm 3
Stage 2 Nm 30
Stage 3 ∠° 90
EXHAUST SYSTEM

Number Designation Engine 176 in model 223
BA49.10-P-1004-02Y Screw, Exhaust system bracket to transmission Nm 20
Fig 1: Identifying Long Wedge (115 589 03 59 00)
G07070400Courtesy of MERCEDES-BENZ USA
Fig 2: Identifying Ring Wrench (177 589 00 03 00)
G11971950Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Counterholder (725 589 03 40 00)
G14789988Courtesy of MERCEDES-BENZ USA
REPAIR MATERIALS

Number Designation Order number
BR00.45-Z-1001-06A Long-life grease A 000 989 63 51 11
BR00.45-Z-1028-04A Assembly cleaner A 000 986 56 01
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