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Remove/install alternator - AR15.40-P-5032CD

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ENGINE 651 in MODEL 172, 204, 207, 212 (except 212.098/298), 218, 221 

Fig 1: Alternator Remove/Install Components
G09975095Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
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 vehicle manufacturer. AS00.00-Z-0010-01A
1 Disconnect ground line at the on-board electrical system battery MODEL 172 AR54.10-P-0003W
MODEL 204 AR54.10-P-0003CW
MODEL 207, 212, 218 AR54.10-P-0003EW
MODEL 221
NOTES
Do not connect quiescent current retention unit.
There risk of a short circuit otherwise.
IMPORTANT Insulate ground line to prevent unintentional contact between detached ground line and battery ground point.
AR54.10-P-0003SX
2 Remove cylinder head cover trim    
3 Remove belt drive cover    
4 Remove fan unit Only for sequential turbocharging.  
MODEL 172, 204, 207 AR20.40-P-5050CW
MODEL 212, 218 AR20.40-P-5050EW
MODEL 221 AR20.40-P-5000SXI
5 Remove poly-V belt MODEL 172, 207, 212, 218, 221 AR13.20-P-0001OMA
MODEL 204, 212 (except 212.098/298) AR13.22-P-1202CD
MODEL 204.9 AR13.20-P-0001OMD
6.1 Remove bottom sections of soundproofing MODEL 172, 204.0/2/3, 207, 212, 218  
MODEL 172 AR94.30-P-5300W
MODEL 204.0/2/3, 207, 212, 218 AR94.30-P-5300EW
6.2 Remove lower engine compartment paneling MODEL 204.9, 221  
MODEL 204.9 AR61.20-P-1105CY
MODEL 221 AR61.20-P-1105SX
7 Remove diagonal struts MODEL 172  
TORQUE SPECIFICATION Self-locking bolt, front diagonal strut to frame floor or front axle carrier *BA61.10-P-1006-01A 
8 Lower rack-and-pinion steering MODEL 172  
AR46.20-P-0600V
9.1 Disconnect charge air hose upstream of charge air cooler on turbocharger Only for sequential turbocharging.  
AR09.41-P-1311-01AL
9.2 Disconnect charge air duct upstream of charge air cooler on exhaust gas turbocharger and charge air hose upstream of charge air cooler and remove Only with single-stage charging:  
AR09.41-P-1311-01AL
9.3 Remove charge air hose upstream of charge air cooler Vehicles with 4MATIC.  
AR09.41-P-8619CD
10 Detach cable bracket from holder (3)    
11 Remove screw/bolts (1, 2) and bracket (3) TORQUE SPECIFICATION Bolt, turbocharger bracket to turbocharger bypass flap *BA09.40-P-1007-01P 
TORQUE SPECIFICATION Bolt, turbocharger bracket to engine support/major assembly carrier *BA09.40-P-1008-01P 
TORQUE SPECIFICATION Screw/bolt, alternator to major assembly carrier *BA15.40-P-1004-01Q 
12 Detach protection against accidental contact and detach electrical line circuit 30 (4) from alternator (G2) TORQUE SPECIFICATION Nut, circuit B+ to alternator *BA15.40-P-1001-01Q 
13 Unplug electrical connector (5) from alternator (G2)    
14 Loosen P/S pressure line on alternator bracket Vehicles with 4MATIC and manual power steering pump  
15 Remove screw/bolts (6) and pull alternator (G2) upwards and out TORQUE SPECIFICATION Screw/bolt, alternator to major assembly carrier *BA15.40-P-1004-01Q 
16 Install in the reverse order    
TURBOCHARGER

Number Designation ENGINE 651
BA09.40-P-1007-01P Bolt, turbocharger bracket to turbocharger bypass flap M6 Nm 9
TURBOCHARGER

Number Designation ENGINE 651
BA09.40-P-1008-01P Bolt, turbocharger bracket to engine support/major assembly carrier M8 Nm 20
ALTERNATOR

Number Designation ENGINE 651
BA15.40-P-1004-01Q Screw/bolt, alternator to major assembly carrier Nm 20
ALTERNATOR

Number Designation ENGINE 651
BA15.40-P-1001-01Q Nut, circuit B+ to alternator Nm 18
FRAME FLOOR ASSEMBLY

Number Designation MODEL 172
BA61.10-P-1006-01A Self-locking bolt, front diagonal strut to frame floor or front axle carrier Nm 60