Remove/install alternator

AR15.40-P-5032CD

Remove/install alternator

04.11.2019

Engine

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

Modification notes

14.10.2019

Screw, alternator to major assembly carrier/oil filter

BA15.40-P-1004-01Q

1

Bolts

2

Bolts

3

Bracket

4

Terminal 30 connection

5

Electrical connector

6

Bolts

G2

Alternator

 

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 the 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

AR54.10-P-0003SX


Do not connect no-load current retention unit.
There risk if a short circuit otherwise.

 Insulate ground line to prevent unintentional contact between detached ground line and battery ground point.

2

Remove cylinder head cover trim

3

Remove belt drive cover

4

Remove fan unit

Only for sequential turbo-charging.

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 204.0/2/3

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

 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 ATL

Only for sequential turbo-charging.

AR09.41-P-1311-01AL

9.2

Disconnect charge air duct upstream of charge air cooler on ATL 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 screws (1, 2) and remove bracket (3)

 Bolt, turbocharger bracket to turbocharger bypass flap

*BA09.40-P-1007-01P

 Bolt, turbocharger bracket to engine support/major assembly carrier

*BA09.40-P-1008-01P

 Screw, alternator to major assembly carrier/oil filter

*BA15.40-P-1004-01Q

12

Detach protection against accidental contact and detach electrical line circuit 30 (4) from alternator (G2)

 Nut, circuit B+ to alternator

*BA15.40-P-1001-01Q

13

Unplug electrical connection (5) from alternator (G2)

14

Loosen P/S pressure line on alternator bracket

Vehicles with 4MATIC and mechanical power steering pump

15

Remove screw/bolts (6) and pull alternator (G2) upwards and out

 Screw, alternator to major assembly carrier/oil filter

*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 in model 166, 172, 204, 205, 207, 212, 218, 222, 253, 447, 636, 906, 900, 907, 090, 091, 910

BA15.40-P-1001-01Q

Nut, circuit B+ to alternator

Nm

18

 Alternator

Number

Designation

Engine 651 in model 166, 172, 204, 205, 207, 212, 218, 222, 253, 447, 636, 906, 900, 907, 090, 091, 910

BA15.40-P-1004-01Q

Screw, alternator to major assembly carrier/oil filter

Stage 1

Nm

20

Stage 2

Nm

-

 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