General Information to High-voltage battery calibration
Topic number

LI54.10-N-078161

Version

1

Function group

54.10 - Battery, power supply, voltage converter

Date

8/8/24

Validity

eSprinter 2.0

Reason for change

Complaint
IC message:
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"Unable to calibrate battery, see Operator’s Manual."
"Calibrate battery to ensure max. range is achieved, start charging process up to 100%". Remedy: Standard calibration is necessary.
"Calibrate battery to ensure max. range is achieved, charging time extension: start XX min AC charging up to
100%". Remedy: Special calibration is necessary.
"Battery calibration necessary, start AC charging up to 100% for state of charge: max. 15%; outside temperature: min. 15 °C". Remedy: Special calibration is necessary.

Cause
The eSprinter 2.0 (model series 907) is equipped with a high-voltage battery with LFP (lithium iron phosphate) technology.
This stands out in comparison to the NMC technology (lithium nickel manganese cobalt oxide) through its particularly
long service life
but it has to be calibrated regularly to achieve a precise SOC and range forecast.
Ideally, along with the automatic calibration, a special calibration should also be conducted 2 times a year.

Remedy
Automatic/standard calibration of high-voltage battery
Conducted automatically during every charging process up to 100% and it does not need to be triggered.
Requirements for special and manual calibration:
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The driver can wait for the calibration-related extended charging time to be completed.
The outside temperature is at least 15 °C.
The state of charge is less than 15%.
High-voltage battery charged up to 100%.

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With automatic calibration the high-voltage battery has to be charged with AC. With manual calibration, DC charging is also an option.
Check if a departure time is preset that is reached before the end of the charging time (including charging time
extension) and, where possible, deactivate it.
Check if the maximum state of charge is set to 100%.
Check if, during calibration, an electrical consumer was used or if the power supply was switched on.
Where possible, avoid any strong cooling of the vehicle or re-arrange the time of the calibration until the weather
conditions are more favorable.

Perform special calibration
After confirming the special calibration in the IC, this is then performed during the next charging process. Do not interrupt the calibration, even if the charging process pauses. The charging time can be extended.
Calibration is completed when the IC message appears: "Battery calibration successful, max. battery capacity and
range restored" or "Unable to calibrate battery, see Owner's Manual".
If the calibration cannot be successfully completed, check the above-mentioned requirements are met and then start
the calibration again.
If the calibration fails again, run a manual calibration.
Manual calibration of high-voltage battery
The high-voltage battery can be manually calibrated if the automatic calibration repeatedly fails or if it is not possible
to charge using alternating current (AC).
The above-mentioned requirements apply.
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Park the vehicle in the immediate vicinity of a charging station with a minimum output of 11 kW. However, do not
connect it yet to the charging station.
Leave the vehicle parked there for at least 6 hours.
During the 6 hour non-operational time, the vehicle must not be started or moved. The doors must remain closed
and the electrical consumers or pre-entry climate control must not be active.
After the 6 hour non-operational time has elapsed, connect the vehicle to the charging station.
During the charging process, electrical consumers can be active and the power supply can be switched on.
Fully charge the vehicle up to a 100% state of charge: Calibration is completed when the 100% state of charge
is reached.

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
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
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Communication/information > Information display > Displays > Multifunction display > Multifunction display, error
messages > Drivetrain - Malfunction (white warning message)
Overall vehicle > Power supply > High-voltage on-board electrical system > High-voltage battery > Display message

Operation numbers/damage codes
Op. no.

Operation text

Time

Damage
code

Note

54719TQ

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