This video is step-by-step DIY to remove and replace the alternator, and also the voltage regulator. Also shown is a repair to the voltage regulator connector.
Check the Pinned Comment or below for the Timestamps, part numbers, and other info.
I hope the video is helpful. Thanks for watching, and good luck with your repair!
Timestamps and part numbers:
00:21 Diagnostics
Remove the Alternator:
01:21 Disconnect the negative terminal on the battery
02:15 Remove the air box
04:51 Remove the shield plate (E8)
05:10 Identify the alternator type (Bosch or Valeo)
05:30 Disconnect the B+ terminal (12mm or 13mm)
05:53 Remove belt from alternator pulley (17mm)
08:04 Alternator pulley, bearings inspection
08:29 Remove two alternator bolts (E14)
10:16 Pry the alternator from the bracket
12:52 Disconnect the voltage regulator electrical
14:35 Remove the alternator from the engine bay
Replacement alternator part numbers (verify fitment for your model and year):
For ML320, ML350 (120 Amp): Bosch AL0787X; Valeo 0111549102.
For ML500 (150 Amp): Bosch AL0819X.
On the bench:
15:15 Alternator bearing inspection
15:52 Remove the voltage regulator
18:17 Voltage regulator inspection; voltage regulator for Bosch alternators: Bosch F00M144136 (MB A003 154 9706).
19:22 Inspection of brushes on Voltage regulator
20:41 Clean the voltage regulator contacts (if reusing your voltage regulator)
21:32 Reinstall the voltage regulator (Screws: 20 inch-lbs; nut on the long stud: 22 ft-lbs; nut on short stud: 9 ft-lbs)
Repair the voltage regulator wire:
24:28 Repair the wire for the voltage regulator: connector part # MB 168 545 2928.
25:08 Remove the wire end from the connector
28:04 Install wire end to the connector
30:02 Types of heat shrink for a wire repair
31:18 How to use heat shrink for a wire repair
33:41 Repairing the voltage regulator wire on this ML
36:43 Reinstall the voltage regulator connector on the vehicle
Install the Alternator:
37:47 Adjust the alternator bracket bushing, if needed
38:40 Alternator hose bracket orientation
39:20 Connect the voltage regulator electrical
39:47 Install the alternator to the bracket
40:17 Install the alternator bolts (E14, torque to 31 ft-lbs)
42:36 Connect two cables to the alternator B+ post (torque to 160 inch-lbs)
43:22 Conncet the hose bracket
44:11 Reinstall the belt (17mm)
46:32 Belt routing guide
48:20 Install the heat shield (E8)
48:32 Install the airbox
52:22 Reconnect the battery
52:42 Start and test
I hope this video is helpful. Thanks for watching, and good luck with your repair!
Check the Pinned Comment or below for the Timestamps, part numbers, and other info.
I hope the video is helpful. Thanks for watching, and good luck with your repair!
Timestamps and part numbers:
00:21 Diagnostics
Remove the Alternator:
01:21 Disconnect the negative terminal on the battery
02:15 Remove the air box
04:51 Remove the shield plate (E8)
05:10 Identify the alternator type (Bosch or Valeo)
05:30 Disconnect the B+ terminal (12mm or 13mm)
05:53 Remove belt from alternator pulley (17mm)
08:04 Alternator pulley, bearings inspection
08:29 Remove two alternator bolts (E14)
10:16 Pry the alternator from the bracket
12:52 Disconnect the voltage regulator electrical
14:35 Remove the alternator from the engine bay
Replacement alternator part numbers (verify fitment for your model and year):
For ML320, ML350 (120 Amp): Bosch AL0787X; Valeo 0111549102.
For ML500 (150 Amp): Bosch AL0819X.
On the bench:
15:15 Alternator bearing inspection
15:52 Remove the voltage regulator
18:17 Voltage regulator inspection; voltage regulator for Bosch alternators: Bosch F00M144136 (MB A003 154 9706).
19:22 Inspection of brushes on Voltage regulator
20:41 Clean the voltage regulator contacts (if reusing your voltage regulator)
21:32 Reinstall the voltage regulator (Screws: 20 inch-lbs; nut on the long stud: 22 ft-lbs; nut on short stud: 9 ft-lbs)
Repair the voltage regulator wire:
24:28 Repair the wire for the voltage regulator: connector part # MB 168 545 2928.
25:08 Remove the wire end from the connector
28:04 Install wire end to the connector
30:02 Types of heat shrink for a wire repair
31:18 How to use heat shrink for a wire repair
33:41 Repairing the voltage regulator wire on this ML
36:43 Reinstall the voltage regulator connector on the vehicle
Install the Alternator:
37:47 Adjust the alternator bracket bushing, if needed
38:40 Alternator hose bracket orientation
39:20 Connect the voltage regulator electrical
39:47 Install the alternator to the bracket
40:17 Install the alternator bolts (E14, torque to 31 ft-lbs)
42:36 Connect two cables to the alternator B+ post (torque to 160 inch-lbs)
43:22 Conncet the hose bracket
44:11 Reinstall the belt (17mm)
46:32 Belt routing guide
48:20 Install the heat shield (E8)
48:32 Install the airbox
52:22 Reconnect the battery
52:42 Start and test
I hope this video is helpful. Thanks for watching, and good luck with your repair!
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