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Remove/Install Transfer Case Control Unit - AR28.19-P-1003MNO

Model 167 with engine 176 with transmission 725.0 

Model 167 with engine 177 with transmission 725.0 

Fig 1: Transfer Case Control Unit Components Location - Model 167 With Engines 176; 177 With Transmission 725.0 (Shown With Code 430)
G14790547Courtesy of MERCEDES-BENZ USA

Shown on model 167 with engine 176 with code 430 (Off-road package) 

Shown with code 430 (Off-road package) 

G14790548Courtesy of MERCEDES-BENZ USA
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  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Put transmission into neutral position. NOTES Do not park vehicle in off-road program.
Otherwise damage will occur.
 
2 Remove ground line of battery.   AR54.10-P-0003ME
3 Lift vehicle with vehicle lift.   AR00.60-P-1006A
4 Remove shield (4). TORQUE SPECIFICATION Model 167 with engine 176 with transmission 725.0 with code 430 (Offroad package) Screw, shield to off-road bracket *BA28.10-P-1008-01I 
5 Release and disconnect electrical connector (2).    
6 Unclip electric lines (7, 9) from holder (8). Model 167 with engine 176 with transmission 725.0 with code 430 (Offroad package)  
    SPECIAL TOOL Dismantling tool Fig 2
7 Remove holder (8). Model 167 with engine 176 with transmission 725.0 with code 430 (Offroad package)  
    TORQUE SPECIFICATION M6X1 *BA00.10-P-1002-04A 
8 Remove bolts (3). TORQUE SPECIFICATION Bolt, transfer case control unit to transfer case *BA28.19-P-1002-01B 
9 Remove transfer case control unit (N15/7). INSTALLATION IMPORTANT The lugs of the transfer case control unit (N15/7) must engage in the grooves in the transfer case (1).
Damage will otherwise occur.
INSTALLATION IMPORTANT Replace seals.
 
10 Install in the reverse order.    
11 Perform commissioning of transfer case control unit (N15/7). When replacing the transfer case control unit (N15/7).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-06ME
12 Read out and delete fault memory.    
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-06ME
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
13 Perform engine test run; while doing so, check transfer case (1) for proper operation and leak tightness.    
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
COMPLETE TRANSFER CASE

Number Designation Model 167 with code 430
BA28.10-P-1008-01I Screw, shield to off-road bracket M5 Nm 5
TRANSFER CASE ELECTRICAL SYSTEM

Number Designation Model 167
BA28.19-P-1002-01B Bolt, transfer case control unit to transfer case M8 Nm 22
Fig 2: Identifying Dismantling Tool (000 589 95 63 00)
G12619044Courtesy of MERCEDES-BENZ USA