AI Damage2023 Mercedes-Benz redundant EQS 450 reliability: common problems
Owners of the 2023 Mercedes-Benz redundant EQS 450 filed 6 complaints with NHTSA, most often about electrical system and forward collision avoidance. The maker issued 122 service bulletins for this year. Details by component below, with sources.
Key figures
- Owner complaints
- 6
- Technical service bulletins (TSB)
- 122
What fails most often
- 1 Electrical system 50% of all complaints
- 2 Forward collision avoidance 33% of all complaints
- 3 Air bags 17% of all complaints
- 4 Service brakes 17% of all complaints
- 5 Tires 17% of all complaints
- Electrical system: 3 complaints (50% of all); manufacturer bulletins for this component: 75.
- Forward collision avoidance: 2 complaints (33% of all); manufacturer bulletins for this component: 4.
- Air bags: 1 complaints (17% of all); manufacturer bulletins for this component: 1.
- Service brakes: 1 complaints (17% of all); manufacturer bulletins for this component: 1.
- Tires: 1 complaints (17% of all).
Symptoms owners describe
How many of the 6 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 3 | 0 | 75 |
| Forward collision avoidance | 2 | 0 | 4 |
| Air bags | 1 | 0 | 1 |
| Service brakes | 1 | 0 | 1 |
| Tires | 1 | 0 | 0 |
| Structure | 0 | 0 | 13 |
| Exterior lighting | 0 | 0 | 12 |
| Visibility | 0 | 0 | 9 |
| Seats | 0 | 0 | 8 |
| Steering | 0 | 0 | 6 |
| Backover prevention | 0 | 0 | 5 |
| Suspension | 0 | 0 | 5 |
| Engine | 0 | 0 | 4 |
| Lane departure | 0 | 0 | 4 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
The vehicle went to catch on fire and the electrical socket burnt so it could no longer charge. The airbag showed malfunction passenger side door. Multiple times the collision warning has malfunction and alerted there was a collision when none occurred.
It is causing frequent phantom braking and sudden stops both in normal driving use and cruise control.
Car turns off completely while driving with "Battery malfunction" and "Towing not permitted" error. This happened while driving on a highway at the end of a bridge going downhill so I was able to pullover to the shoulder before the vehicle came to complete stop but if this happened while on the bridge going uphill,…
No warning lights were illuminated. The vehicle was taken to the dealer but was not yet diagnosed. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 24V372000 (Electrical System); but the VIN was not included.
The vehicle was taken to the local dealer who was unable to duplicate the failure. The vehicle was not repaired. The manufacturer was not yet contacted. The failure mileage was 1,000.
So I've had to have 1 tire replaced already working on number 2. First one not sure what the problem was, but this tire is having problems holding air. It'll hold air for about 9 hours then the gauge on inside of car comes in saying low tire pressure.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 12,234 of 32,257 model years in the NHTSA data (top 38% most complained about).
On average one model year of the redundant EQS 450 has 3 complaints (2 years in the data). This year has 6, above average.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Forward collision avoidance. Radar and camera: calibration after bumper or windshield replacement.
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Complaint Yellow instrument cluster message
"Cooling system fault, operating energy input reduced, service required". Cause Fault code "B3A0077 - The regulation valve in the refrigerant circuit for the battery cooling gets stuck open. The ordered position cannot…
- Complaint The "Easy entry and exit feature" function deactivates itself after a brief period
(see attachment). Cause The cause is currently being investigated. Remedy Update the HU7 to the latest software version, then perform a factory reset of the HU7. Steps to perform factory reset: Navigate to Settings >…
- Complaint Clanking noise from the area of the speakers in the doors
Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and…
- Complaint The OTA software update prepares the SRS/ORC controller and enables it to be updated remotely in…
Complaint The OTA software update prepares the SRS/ORC controller and enables it to be updated remotely in the future. Based on technician feedback, the OTA (code: 25P5496529) does not start even after an extended…
- Complaint One of the flush door handles (Also referred to as Seamless Door Handles) does not…
Complaint One of the flush door handles (Also referred to as Seamless Door Handles) does not extend/retract (and/or) the KeylessGo sensor surfaces do not respond. Cause Multiple possible causes can be inferred from the…
- Complaint
Red 12 V battery warning message in IC DTC stored in EZS or currently: B161609 No DTC in DC/DC converter DC/DC converter is not providing any output voltage or output current Cause: Due to a reduction in resistance at…
- Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has updated driver assistance system SCN…
Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has updated driver assistance system SCN coding available for certain subject vehicles. The updated SCN coding improves system stability and enhances the…
- Complaint Reduced Drive Power' warning displayed on Instrument Cluster, as Illustrated in the Picture, but…
Complaint Reduced Drive Power' warning displayed on Instrument Cluster, as Illustrated in the Picture, but no relevant fault codes are present. Cause There are several reasons for the activation of the Reduced Drive…
- Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the…
Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). Note: Sound file in…
- Complaint Squeaking or creaking noises on uneven roadways, in turns, or when moving in their seat
Cause Noise in the backrest adjustment mechanism Remedy The adjustment mechanism is treated with dry lubricant spray A000 989 35 60 to rectify the noise. To do this, proceed as follows: • Move the seat to the front…
- Complaint The adaptive rear compartment lighting is sporadically inoperative
In one or all rear interior lamps, one of the following specified fault codes (DTC) is stored. • E48/3 (Adaptive rear interior lamp, roof, left) / DTC B17D149 - The "Adaptive interior lighting" control unit for the…
- Complaint Vehicle will not start, High Voltage Malfunction error in IC Cause The FUSI (function safety)…
Complaint Vehicle will not start, High Voltage Malfunction error in IC Cause The FUSI (function safety) lock is activated which is causing the vehicle to not operate. Remedy SW resolution implemented with BMS SW…
NHTSA lists 122 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2023 Mercedes-Benz redundant EQS 450?
Owner complaints to NHTSA most often mention: electrical system, forward collision avoidance, air bags. Total complaints: 6. The most frequent symptoms in complaint texts: driver assists: adaptive cruise, lane keeping (17%), brakes on its own (phantom braking) (17%), smoke, burning smell, fire (17%).
How many service bulletins (TSB) were issued for the 2023 Mercedes-Benz redundant EQS 450?
NHTSA lists 122 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2023 Mercedes-Benz redundant EQS 450 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2023 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-06.