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Mercedes-Benz P0E9700

As a consequence, on vehicles with BMS30EB02, the DTC for the auxiliary assembly fuse P0E2F00 can be set. This triggers the yellow HV drive system warning message. In the ignition

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact an authorized Mercedes-Benz service provider for diagnosis. Prompt service is appropriate when any red 12 V battery, red HV, white HV, or yellow HV drive-system warning message is displayed.
Confidence95%

Quick answer

For certain 2022–2025 US Mercedes-Benz EQB and G-Class vehicles, P0E9700 is documented in Mercedes-Benz bulletin LI54.10-P-079533 as one of several possible DC/DC converter fault codes. The bulletin describes associated 12 V and high-voltage warning messages. The specific meaning of P0E9700 is not established by the supplied verified evidence.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

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1. What does P0E9700 mean?

For certain 2022–2025 US Mercedes-Benz EQB and G-Class vehicles, P0E9700 is documented in Mercedes-Benz bulletin LI54.10-P-079533 as one of several possible DC/DC converter fault codes. The bulletin describes associated 12 V and high-voltage warning messages. The specific meaning of P0E9700 is not established by the supplied verified evidence.

2. Technical explanation

Official Mercedes-Benz manufacturer communications filed with NHTSA describe a fault pattern involving the DC/DC converter. P0E9700 may be stored with P0C3B00, P0E5400, and P0C4000. In some cases, not all codes in this group are present. A second group—P1D0B00, P1CA000, and U011500—may also be stored, with some codes potentially absent. For vehicles with BMS30EB02, the bulletin states that P0E2F00 for the auxiliary assembly fuse can be set as a consequence; this triggers the yellow HV drive system warning message. The supplied evidence does not establish a standalone component-level definition or root cause for P0E9700.

3. What system is affected?

The verified bulletin identifies the DC/DC converter as the control unit that stores P0E9700. It also describes 12 V battery and high-voltage drive-system warnings. A broader system diagnosis is not yet established by verified evidence.

4. How serious is this code?

Unknown. The supplied verified evidence documents potentially escalating warning messages but does not provide an official severity classification for P0E9700.

5. Symptoms you may notice

  • A red 12 V battery message may be displayed.
  • A white HV warning message may be displayed.
  • A warning message may be shown in the instrument cluster.
  • If the initial warning messages are ignored in the same ignition cycle, a red HV warning message and a yellow HV drive system warning message may be displayed.
  • On vehicles with BMS30EB02, P0E2F00 can be set and triggers the yellow HV drive system warning message.

6. Possible causes

  • The supplied verified evidence does not establish a root cause for P0E9700.
  • The official bulletin documents P0E9700 as part of a DC/DC converter fault-code pattern.
  • For BMS30EB02 vehicles, the bulletin states that P0E2F00 may be set as a consequence; it does not establish this as the cause of P0E9700.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • Do not ignore displayed 12 V, HV, or HV drive-system warning messages.
  • Arrange diagnosis by an authorized Mercedes-Benz service provider, especially if red warning messages are displayed.
  • Do not attempt high-voltage or DC/DC converter repairs yourself.

10. Step-by-step troubleshooting

  1. Have a qualified Mercedes-Benz technician check the DC/DC converter for stored diagnostic trouble codes.
  2. Provide the technician with all active warning messages and the ignition-cycle sequence in which they appeared.
  3. Ask the service provider to assess applicability of Mercedes-Benz bulletin LI54.10-P-079533.

11. When to contact service

Contact an authorized Mercedes-Benz service provider for diagnosis. Prompt service is appropriate when any red 12 V battery, red HV, white HV, or yellow HV drive-system warning message is displayed.

12. What the service center may check

  • Check the DC/DC converter for P0C3B00, P0E9700, P0E5400, and P0C4000.
  • Check whether P1D0B00, P1CA000, and U011500 are also stored; the bulletin states that not all codes in either group are necessarily triggered.
  • For vehicles with BMS30EB02, check whether P0E2F00 is stored.
  • Review the vehicle against Mercedes-Benz bulletin LI54.10-P-079533.

13. Possible repair or resolution

  • The supplied verified evidence does not provide a repair procedure or confirmed repair resolution for P0E9700.
  • Use the current Mercedes-Benz service information and bulletin LI54.10-P-079533 to determine the applicable authorized repair.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Mercedes-Benz LI54.10-P-079533, filed with NHTSA as Manufacturer Communication 11021800 on 2025-08-08.
  • Mercedes-Benz LI54.10-P-079533, filed with NHTSA as Manufacturer Communication 11021970 on 2025-08-05.
  • Mercedes-Benz LI54.10-P-079533, filed with NHTSA as Manufacturer Communication 11023154 on 2025-09-16.
  • Mercedes-Benz LI54.10-P-079533, filed with NHTSA as Manufacturer Communication 11028815 on 2026-02-14.
  • Mercedes-Benz LI54.10-P-079533, filed with NHTSA as Manufacturer Communication 11029977 on 2026-03-11.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official source: Mercedes-Benz manufacturer communications filed with NHTSA under bulletin LI54.10-P-079533. The supplied evidence applies to 2022–2025 US Mercedes-Benz EQB and G-Class vehicles.

19. Frequently asked questions

What does P0E9700 mean on a Mercedes-Benz EV?

The supplied verified evidence does not establish a standalone definition for P0E9700. It identifies P0E9700 as one of a group of codes that may be stored by the DC/DC converter.

Can P0E9700 appear with other codes?

Yes. The bulletin lists P0C3B00, P0E9700, P0E5400, and P0C4000 as a group, and also identifies P1D0B00, P1CA000, and U011500 as another possible group. Not all codes in a group are necessarily stored.

Does P0E9700 cause the yellow HV drive system warning?

The supplied bulletin specifically states that P0E2F00 can be set on vehicles with BMS30EB02 and that P0E2F00 triggers the yellow HV drive system warning message. It does not specifically state that P0E9700 alone triggers that message.

Which vehicles are covered by the supplied evidence?

The supplied applicability data identifies US-market 2022–2025 Mercedes-Benz EQB and G-Class vehicles.

20. Sources & verification

Verified
Mercedes-Benz P0E9700: As a consequence, on vehicles with BMS30EB02,… | EV Diagnostics