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Mercedes-Benz DIGITAL LIGHT reduced range of functions

DIGITAL LIGHT reduced range of functions

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService evaluation is appropriate because Mercedes-Benz has published software-update procedures for documented instances of this message and FC151E29. The supplied evidence does not establish urgency or driving restrictions.
Confidence90%

Quick answer

For verified 2024–2025 US Mercedes-Benz EQE applicability, this alert can be associated with fault FC151E29 in the HLI/headlamp range-adjustment control system. Mercedes-Benz communications identify HLI software processing or electronic interference at the front-axle level-sensor signal as documented causes in specific cases. The documented remedy is a control-unit software update; parts replacement is not indicated by the cited LI82.10-P-078470 communications.

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 DIGITAL LIGHT reduced range of functions mean?

For verified 2024–2025 US Mercedes-Benz EQE applicability, this alert can be associated with fault FC151E29 in the HLI/headlamp range-adjustment control system. Mercedes-Benz communications identify HLI software processing or electronic interference at the front-axle level-sensor signal as documented causes in specific cases. The documented remedy is a control-unit software update; parts replacement is not indicated by the cited LI82.10-P-078470 communications.

2. Technical explanation

The instrument-cluster message “DIGITAL LIGHT reduced range of functions” is documented in Mercedes-Benz service communications together with “Adaptive high beams assistant not available/inoperative” and fault FC151E29: “The level sensor at front left has a malfunction. There is an invalid signal.” The affected control system is identified as the HLI control unit or the HLI/LED headlamp range-adjustment control unit at the front left. Mercedes-Benz communications describe more than one documented software/signal-processing scenario, so the message alone does not establish which scenario applies to an individual vehicle.

3. What system is affected?

DIGITAL LIGHT, adaptive high-beam assistance, and front-left HLI/LED headlamp range-adjustment control system.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Instrument-cluster message: “DIGITAL LIGHT reduced range of functions.”
  • Instrument-cluster message: “Adaptive high beams assistant not available/inoperative.”
  • Fault FC151E29 may be stored: “The level sensor at front left has a malfunction. There is an invalid signal.”

6. Possible causes

  • HLI control-unit processing of level-sensor data, as documented in LI82.10-P-078470.
  • Older HLI control-unit software release, as documented in LI82.10-P-078470.
  • Electronic interference occurring at the sensor level of the front axle, as documented in LI82.10-P-079179.

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

  • Arrange diagnosis by a Mercedes-Benz service provider using the applicable Mercedes-Benz service information.
  • Report the exact instrument-cluster message and whether fault FC151E29 was found during diagnosis.
  • Do not replace parts solely for the LI82.10-P-078470 scenario; the cited communications state that parts replacement will not resolve that complaint.

10. Step-by-step troubleshooting

  1. Verify whether the message is accompanied by “Adaptive high beams assistant not available/inoperative.”
  2. Check the HLI control unit or front-left HLI/LED headlamp range-adjustment control unit for FC151E29, as specified in the cited service communications.
  3. Determine which applicable Mercedes-Benz service communication and software level apply before carrying out repairs.

11. When to contact service

Service evaluation is appropriate because Mercedes-Benz has published software-update procedures for documented instances of this message and FC151E29. The supplied evidence does not establish urgency or driving restrictions.

12. What the service center may check

  • Read fault memory for FC151E29 in the HLI control unit or front-left HLI/LED headlamp range-adjustment control unit.
  • Confirm the installed HLI control-unit software and applicable control-unit hardware/software configuration.
  • Assess applicability of LI82.10-P-078470 or LI82.10-P-079179 based on the vehicle configuration and diagnostic findings.
  • Where LI82.10-P-078470 applies, the cited instructions specify updating the HLI control units starting with the left/driver-side controller, followed by SCN coding of the EZS.
  • Where LI82.10-P-079179 applies, update the HLI/LED headlamp range-adjustment control units.

13. Possible repair or resolution

  • LI82.10-P-078470: Update HLI control-unit software. The May 2025 communications specify beginning with the left/driver-side controller and then performing SCN coding of the EZS.
  • LI82.10-P-079179: Update the HLI/LED headlamp range-adjustment control units.
  • For the LI82.10-P-078470 complaint described in the supplied evidence, parts replacement is stated not to resolve the complaint and parts should not be replaced.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Mercedes-Benz LI82.10-P-078470, reported through NHTSA as Manufacturer Communication 11009138 (published October 22, 2024): older HLI software; update HLI control units E1n9/E2n9.
  • Mercedes-Benz LI82.10-P-078470, reported as 11012804 (published January 3, 2025): HLI processing of level-sensor data; software fix was under development at that publication; states parts replacement will not resolve the complaint.
  • Mercedes-Benz LI82.10-P-078470, reported as 11018297 and 11018365 (published May 13–14, 2025): update HLI control units beginning with the left/driver-side controller, then perform SCN coding of the EZS; parts replacement is not the remedy described.
  • Mercedes-Benz LI82.10-P-079179, reported as 11017208 and 11023024 (published April 21 and September 3, 2025): electronic interference at the front-axle sensor level; update HLI/LED headlamp range-adjustment control units.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official manufacturer communications are published through NHTSA: LI82.10-P-078470 (NHTSA IDs 11009138, 11012804, 11018297, and 11018365) and LI82.10-P-079179 (NHTSA IDs 11017208 and 11023024).

19. Frequently asked questions

What fault may be associated with “DIGITAL LIGHT reduced range of functions”?

The cited Mercedes-Benz communications associate the message with FC151E29, describing an invalid signal from the front-left level sensor.

Is a component replacement the documented repair?

For the LI82.10-P-078470 scenario, the cited communications state that replacing parts will not resolve the complaint. The documented remedy is an HLI software update, with SCN coding of the EZS specified in the May 2025 versions.

Is this confirmed to affect my Mercedes-Benz EQE?

The supplied applicability data covers US-market 2024–2025 Mercedes-Benz EQE vehicles. Individual applicability requires confirmation through vehicle diagnosis and the applicable service communication.

Can I continue driving or charging?

Not yet established by verified evidence.

20. Sources & verification

Verified
Mercedes-Benz DIGITAL LIGHT reduced range of functions: DIGITAL LIGHT… | EV Diagnostics