Combustion engine could no longer be
started, only electric driving possible
Topic number

LI15.40-P-077947

Version

4

Function group

15.40 - Generator

Date

8/8/25

Validity

Model series 290, 206, 254, 223 (P3 hybrids with SA
code ME10)

Reason for change

Op. no./damage code revised

Complaint
Combustion engine could no longer be started, only electric driving possible

Attachments
File

Description

HVRSG-GI_Seriennummer.png

Adhesive label with serial number

Prüfung Sicherung B im HV-Protokoll.PNG

Test of fuse B in the high-voltage event log

Cause
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High-voltage belt-driven starter-alternator defective

Remedy
Requirement:
Before carrying out test work, it must be ensured that the person performing the work has successfully completed the
required qualification for work on the high-voltage system.
Note:
In order to check whether the high-voltage belt-driven starter-alternator is defective, please carry out the test below.
If the fault "P0E2F00 The electrical fuse B for the high voltage has a malfunction" is stored in the N82/10 BMS control
unit, the HV protocol must be checked to see whether the fuse for the auxiliary consumers is defective. In this case,
the high-voltage battery must be replaced after the short circuit has been eliminated. (See attachment)
The defective high-voltage belt-driven starter-alternator must always be sent back via the existing return delivery process for analysis.
Check:
Please disconnect the high-voltage plug at the high-voltage belt-driven starter-alternator and connect test adapter 000
589 94 63 00. Measure resistance HV+ to HV-.
If the final measurement result is between 0–1 ohm, the high-voltage belt-driven starter-alternator with the short circuit
must be replaced.
If either one of or both the fault codes P0C0B16 and P0C0B17 are saved in the high-voltage belt-driven starter-alternator control unit G2/3, please replace the high-voltage belt-driven starter-alternator, since no short circuit can be
measured here and this therefore concerns a hardware defect.
Please check the serial number on the silver adhesive label below the SW number on the front of the high-voltage
belt-driven starter-alternator.
Example: 2314300044 (the first 10 digits, see attachment)
Important note: If the number is greater than 2329100027, a TIPS case must be created.
In this instance, please attach the following documents to the TIPS case:

•
•
•
•

Quick test
High-voltage event log
Picture of the silver adhesive label on the front of the high-voltage belt-driven starter-alternator (serial number)
Attach the measurement results with pictures

Disclaimer
NOTE: The information contained in this document is intended for use by trained, professional technicians with the
knowledge to properly and safely perform diagnosis and repairs on Mercedes-Benz vehicles, using Mercedes-Benz
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approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and
provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect
is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a
symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of vehicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes
resulting in the same or similar symptoms or conditions described in this document, and trained professional service
technicians must use their diagnostic skills to make evaluations on a case-by-case basis. The information contained
in this document does not guarantee warranty coverage nor does it extend the vehicle’s warranty in any way.

Symptoms
Overall vehicle > Power supply > Alternator > Function > Overvoltage
Power generation > Engine management > Starter motor > Function > Defective
Power generation > Engine management > Engine start/stop > Does not start
Overall vehicle > Power supply > High-voltage on-board electrical system > High-voltage battery > Display message

Control unit/fault code
Control unit

Fault text

N82/10 - Battery management system (BMS) (BMS10PB01_AMG)

P0E2F00 - Electrical fuse B for the high voltage has a
malfunction. _

G2/3 - Starter-alternator (SG-EM) (HVRSGG10_AMG)

P0BEE00 - The current sensor for phase W of electric
machine A has a malfunction. _
P0BEA00 - The current sensor for phase V of electric machine A has a malfunction. _
P0BE600 - The current sensor for phase U of electric machine A has a malfunction. _

G2/3 - Starter-alternator (SG-EM) (HVRSGG10_AMG)

P0C0B16 - The power supply of the high-voltage onboard electrical system for inverter 'Electric machine A'
has an open circuit. The limit value for electrical voltage
has not been attained.
P0C0B17 - The power supply of the high-voltage onboard electrical system for inverter 'Electric machine A'
has an open circuit. The limit value for electrical voltage
has been exceeded.
P0D2E00 - Sensor 'Voltage of high-voltage on-board
electrical system' in control unit 'Electric machine A' has a
malfunction. _

Operation numbers/damage codes
Op. no.

Operation text

Time

Damage
code

Note

155103

Replace belt-driven starter-alternator

H

1520C92

Proceed as per WIS instructions

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