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Mercedes-Benz · Known Issues

2022 Mercedes-Benz EQB Problems: 9 Known Issues

2022 model year · 2,120+ owner reports · Updated September 2026

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Issue summary

According to Au7o's analysis of 2,120+ owner reports, the 2022 Mercedes-Benz EQB has 9 documented known issues, with 3 rated critical. The most serious are High-Voltage Battery Cell Defect (Farasis Cells) Causing Internal Short and Fire Risk ($0-$0 repair), Improperly Welded Front Axle eATS Spur Gear - Rollaway and Loss of Front Drive ($0-$0 repair) and High-Voltage Battery Bus Bar Secured With Incorrect Screws - Sudden Loss of Drive Power ($0-$0 repair). The most commonly reported issue is Real-World Range Significantly Below EPA Rating with 890 owner reports. Across all issues with published estimates, repair costs range from $1,500 to $6,000. DIY maintenance guides at au7o.io.

In This Article

  • EQB Drivetrain2
  • EQB Electrical4
  • EQB HVAC1
  • EQB Cooling1
  • EQB Brakes1
  • FAQ
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In This Article

  • Drivetrain2
  • Electrical4
  • HVAC1
  • Cooling1
  • Brakes1
  • FAQ

All 9 Known Issues

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Frequently Asked Questions

What are the most common Mercedes-Benz EQB problems?

According to Au7o's analysis of 2,120+ owner reports, the 2022 Mercedes-Benz EQB has 9 documented issues. The most frequently reported are: High-Voltage Battery Cell Defect (Farasis Cells) Causing Internal Short and Fire Risk, Improperly Welded Front Axle eATS Spur Gear - Rollaway and Loss of Front Drive, High-Voltage Battery Bus Bar Secured With Incorrect Screws - Sudden Loss of Drive Power. Of these, 3 are rated critical and should be addressed promptly.

Is the Mercedes-Benz EQB reliable?

The 2022 Mercedes-Benz EQB has 9 known issues documented across 2,120+ owner reports. 3 issues are rated critical: High-Voltage Battery Cell Defect (Farasis Cells) Causing Internal Short and Fire Risk and Improperly Welded Front Axle eATS Spur Gear - Rollaway and Loss of Front Drive and High-Voltage Battery Bus Bar Secured With Incorrect Screws - Sudden Loss of Drive Power. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Mercedes-Benz EQB problems?

Repair costs for known Mercedes-Benz EQB issues range from $0 to $6,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, High-Voltage Battery Cell Defect (Farasis Cells) Causing Internal Short and Fire Risk, typically costs $0-$0 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2022-2024 Mercedes-Benz EQB High-Voltage Battery Cell Defect (Farasis Cells) Causing Internal Short and Fire Risk?

Certain EQB high-voltage battery packs built with early-production lithium-ion cells from Farasis Energy (Ganzhou, China) contain cells that are insufficiently robust against stress factors at high state of charge. A deviation in the supplier's production process allows an intern… Repairs typically run $0-$0. Severity: high.

What is the 2022 Mercedes-Benz EQB Improperly Welded Front Axle eATS Spur Gear - Rollaway and Loss of Front Drive?

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data sourced from 2,120+ owner reports, NHTSA recalls, TSBs, and automotive forums.

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On the 2022 Mercedes-Benz EQB, early 2022 EQB 4MATIC models can have an improperly welded spur gear inside the front-axle electric drive unit (eATS). If the weld fails, the gear no longer transmits torque and the parking lock loses its grip on the front axle, so the vehicle can roll away when parked on a grade even with the transmission in P - and it can lose front-axle drive while moving. NHTSA recall 24V331 (May 2024) covers 2022 EQB 300 4MATIC and EQB 350 4MATIC.

Common Symptoms

  • Vehicle rolls after being shifted into Park
  • Loss of front-axle drive / reduced acceleration
  • Grinding or clunk from front drive unit
  • Drive system warning message

How to Fix

Recall 24V331: the dealer replaces the complete front-axle electric drivetrain (eATS) free of charge. Until the repair is done, always set the electric parking brake and use wheel chocks when parking on any incline. A grinding or clunking noise from the front axle under acceleration, or the car creeping after being shifted to P, should be treated as urgent.

Typical repair cost:$0 - $0

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2022-2023 Mercedes-Benz EQB, on a small production window of EQB 4MATIC models, the internal bus bar connection inside the high-voltage battery was assembled with the wrong screws. The joint can loosen over time, raising resistance at the connection until the contact fails. When it does, the vehicle loses all drive power without any advance warning - potentially at road speed - and typically throws a 'High-Voltage Battery Malfunction' and 'Towing Not Permitted' message on the cluster. NHTSA recall 25V487 (July 2025) covers roughly 660 US vehicles. Owners on the EQ forums report the failure appearing during or right after a charging session, with the car then immobile.

Common Symptoms

  • Sudden total loss of drive power with no warning
  • Red 'MALFUNCTION' message in instrument cluster
  • 'High-Voltage Battery Malfunction' warning
  • 'Towing - Not Permitted' message
  • Vehicle will not move after a charging session

How to Fix

Recall 25V487: dealer inspects the high-voltage battery for the incorrect bus bar screws and replaces the battery where the defect is present, free of charge. There is no owner-side workaround or early warning sign, so VIN-check the vehicle even if it has already had other battery campaigns done. If the malfunction message appears, do not attempt to flat-tow - the message explicitly prohibits it; the car must be flatbedded.

Typical repair cost:$0 - $0

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2022-2024 Mercedes-Benz EQB, certain EQB high-voltage battery packs built with early-production lithium-ion cells from Farasis Energy (Ganzhou, China) contain cells that are insufficiently robust against stress factors at high state of charge. A deviation in the supplier's production process allows an internal short circuit to develop over time, which can escalate to a thermal event and vehicle fire while parked or driving. Mercedes-Benz has confirmed fire incidents in the US. The campaign has been revised three times: NHTSA 25V050 (Feb 2025, software-only), 25V894 (Dec 2025, BMS software), and finally 26V073 (Feb 2026), which supersedes both and replaces the pack outright. Roughly 11,895 US vehicles built Dec 2021 - May 2024 are covered. Interim guidance is to park outdoors away from structures and charge to no more than 80%.

Common Symptoms

  • Recall notice instructing owner to park outdoors
  • Charging limited to 80% by dealer or software update
  • Battery warning or reduced charge capacity
  • Burning smell or smoke in extreme cases
  • Reduced usable range after BMS software update

How to Fix

Have the recall performed at a Mercedes-Benz dealer - under 26V073 the entire high-voltage battery is replaced free of charge, even if the vehicle was already 'repaired' under the earlier software-only campaigns 25V050 or 25V894. Until the pack is replaced, cap charging at 80% (set the charge limit in MBUX), avoid leaving the car at high SOC for long periods, and park outside and away from buildings. Check your VIN on nhtsa.gov/recalls, since the phased parts supply means notification dates vary.

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Typical repair cost:$0 - $0

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2022-2025 Mercedes-Benz EQB, a recurring EQ-family fault where AC (Level 2) charging aborts partway through or refuses to start, while DC fast charging still works normally. The Mercedes me app reports 'charging process interrupted' and the session must be restarted manually, often repeatedly. On the EQB and its siblings the root cause has been traced two ways: a dead pin in the charge port so one AC phase carries no voltage (owners measured 210V on phases 1 and 3 but 0V on phase 2, with stored codes P0EF7FA and P0EF8FA), and a failed temperature sensor on the onboard charging unit. Some cases that look like hardware turn out to be onboard-charger software and clear with an update.

Common Symptoms

  • 'Charging process interrupted' notification in Mercedes me app
  • AC charging stops early and must be restarted by hand
  • Car accepts DC fast charging but refuses AC/home charging
  • Charging never starts on a schedule/timer
  • Reduced AC charging speed (one phase missing)

How to Fix

Have the dealer read the charging module for stored codes and measure phase voltage at the inlet. Confirmed fixes reported by owners: replacement of the charge port/inlet assembly when a pin is not carrying voltage, replacement of the onboard charging unit's temperature sensor, and - in a number of cases - a charging-control software update that resolves the abort without any parts. Before booking service, rule out the EVSE and the scheduled/timed-charging setting, which has caused false 'interrupted' errors on its own.

Typical repair cost:$0 - $1,800

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Community Reported
Medium ConfidenceVerifiedReviewed Aug 2026
Community reported
890 owners

On the 2022-2025 Mercedes-Benz EQB Electric, eQB owners consistently report real-world range 20-30% below the EPA-rated 243 miles, even in moderate weather. The boxy shape and higher weight of the three-row layout contribute to worse aerodynamic efficiency than the sedan-based EQ models, and highway range drops particularly steeply.

This issue also affects: Mercedes-Benz EQE SUV, Mercedes-Benz EQE, Mercedes-Benz EQS

Common Symptoms

  • Range estimate consistently 20-30% below EPA rating
  • Rapid range drop on highway
  • Energy consumption above 3.5 mi/kWh difficult to achieve
  • Range anxiety on longer trips

How to Fix

Maximize range by using Eco drive mode, limiting climate control use, and maintaining tire pressures at 42 PSI. Ensure the latest software update is installed, as Mercedes has released efficiency improvements. For highway driving, keep speeds below 70 mph to avoid steep aerodynamic losses.

Owner tips & cautions

  • TipPlan for 180-200 real miles, not the EPA 243. Keep highway speed at 65 mph or under and use Eco mode. The EQB is best suited as a commuter/suburban vehicle, not a highway cruiser.

Research This Issue

Based on 890 owner reports

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Community Reported
High Confidence890 owner reportsLast reported by owners Mar 2026Reviewed Mar 2026
Community reported
720 owners

On the 2022-2025 Mercedes-Benz EQB Electric, the MBUX infotainment system in the EQB suffers from frequent lag, unresponsive touchscreen inputs, and occasional full system crashes requiring a reboot. The issue is worse after extended use and when multiple connected services are active simultaneously.

This issue also affects: Mercedes-Benz EQE SUV, Mercedes-Benz EQE, Mercedes-Benz EQS

Common Symptoms

  • Touchscreen response delayed by 2-5 seconds
  • Navigation freezes mid-route
  • Screen goes black and reboots spontaneously
  • Voice assistant unresponsive

How to Fix

Perform a soft reboot by holding the power and volume buttons simultaneously for 10 seconds. Install all available OTA updates as Mercedes has released multiple stability fixes. Reduce the number of active connected services and disable unused features to reduce system load.

Owner tips & cautions

  • TipKeep MBUX updated — each OTA release improves stability. If the system gets sluggish, a quick reboot (hold power + volume 10 seconds) clears it up. Disable Mercedes me connect features you do not use.

Research This Issue

Based on 720 owner reports

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Community Reported
High Confidence720 owner reportsLast reported by owners Feb 2026Reviewed Mar 2026

On the 2022-2025 Mercedes-Benz EQB, eQB owners in cold climates report that cabin heat works normally at first, then drops to ambient-temperature air after about 10-20 minutes of driving, with the blower still running and the set temperature unchanged. Shutting the car off and restarting it restores heat - until it drops out again. The same complaint runs across the EQ range. Because the EQB's heat pump circuit is shared with high-voltage battery conditioning, a refrigerant-side or control fault shows up as intermittent cabin heat rather than a hard failure. Dealers struggle with it: the fault is not stored unless the car arrives with the symptom actively present, so cars are frequently returned with 'no fault found'. Cabin/interior temperature sensors have been replaced speculatively with mixed results.

Common Symptoms

  • Heat blows warm then turns cold after ~15 minutes
  • Restarting the car restores heat temporarily
  • Blower runs but air is at ambient temperature
  • Windshield defrost ineffective in cold weather
  • Dealer reports 'no fault found'

How to Fix

Get the car to the dealer while the fault is occurring - do not shut it off en route, since a restart clears the symptom and the diagnosis with it. Ask for the heat pump / thermal management control software to be brought current first; several cases resolved with software alone. Beyond that, documented repairs include replacement of the cabin temperature sensor and inspection of the heat-pump refrigerant circuit and its valves. Note that in very cold weather some heat reduction is normal heat-pump behavior as the system diverts capacity to battery conditioning; the fault case is heat that goes fully cold and stays cold until a key cycle.

Typical repair cost:$0 - $1,500

Research This Issue

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Community Reported
Low ConfidenceVerifiedReviewed Aug 2026

On the 2022-2023 Mercedes-Benz EQB, a manufacturing deviation in the electric drive module left the cooling circuit inside the module inadequately sealed on a range of EQA, EQB and EQC vehicles, allowing coolant to seep into the motor housing. Over time the intruding coolant lowers the insulation resistance of the high-voltage system, which shows up as a no-start, an isolation fault, or - under sustained conditions - reduced drive-module output power. Mercedes-Benz recalled the affected EQA and EQB units in China (8,078 cars, announced Oct 2022, covering production up to Feb 2023) alongside a larger EQC campaign; no equivalent US recall was issued, so US owners should treat coolant loss on an EQB as a drive-unit seal question rather than a hose-only one.

This issue also affects: Mercedes-Benz GLC

Common Symptoms

  • Recurring low coolant level warning
  • Coolant puddle or residue under the drive unit
  • Vehicle fails to start / HV system will not close contactors
  • Reduced drive power warning
  • Isolation or insulation fault stored in the HV system

How to Fix

Any unexplained coolant loss or 'check coolant level' message on an EQB warrants a pressure test of the drive-module cooling circuit and an HV insulation-resistance measurement before topping off and driving on. Confirmed remedy on recalled cars is inspection and replacement/resealing of the electric drive module cooling circuit. Do not simply refill - coolant entering the motor is what damages the HV insulation, and the damage compounds with continued driving.

Typical repair cost:$1,500 - $6,000

Research This Issue

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Community Reported
Low ConfidenceVerifiedReviewed Aug 2026
Community reported
510 owners

On the 2022-2025 Mercedes-Benz EQB Electric, the EQB exhibits inconsistent brake pedal feel as the system blends regenerative and friction braking. At low speeds and low battery state of charge, the transition between regen and friction braking creates a noticeable "dead zone" or sudden grab in the pedal, making smooth stops difficult.

This issue also affects: Mercedes-Benz EQE SUV, Mercedes-Benz EQE, Mercedes-Benz EQS

Common Symptoms

  • Brake pedal feels spongy then suddenly grabs
  • Inconsistent braking force at low speeds
  • Jerky stops in parking lots
  • Brake pedal feel changes based on battery level

How to Fix

A software update from Mercedes recalibrates the brake blending algorithm for smoother transitions. Ensure the latest OTA update is installed. Drivers can also use the steering wheel paddles to control regen intensity manually, bypassing the blended braking issue.

Owner tips & cautions

  • TipUse the paddle shifters to set regen to D- or D-- for more predictable deceleration. The auto-regen mode (D Auto) is where most of the inconsistent pedal feel occurs.

Research This Issue

Based on 510 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence510 owner reportsLast reported by owners Jan 2026Reviewed Mar 2026
get a full repair guide

Early 2022 EQB 4MATIC models can have an improperly welded spur gear inside the front-axle electric drive unit (eATS). If the weld fails, the gear no longer transmits torque and the parking lock loses its grip on the front axle, so the vehicle can roll away when parked on a grade… Repairs typically run $0-$0. Severity: high.

What is the 2022-2023 Mercedes-Benz EQB High-Voltage Battery Bus Bar Secured With Incorrect Screws - Sudden Loss of Drive Power?

On a small production window of EQB 4MATIC models, the internal bus bar connection inside the high-voltage battery was assembled with the wrong screws. The joint can loosen over time, raising resistance at the connection until the contact fails. When it does, the vehicle loses al… Repairs typically run $0-$0. Severity: high.

What is the 2022-2025 Mercedes-Benz EQB Heat Pump / Cabin Heating Cuts to Cold Air After Roughly 15 Minutes?

EQB owners in cold climates report that cabin heat works normally at first, then drops to ambient-temperature air after about 10-20 minutes of driving, with the blower still running and the set temperature unchanged. Shutting the car off and restarting it restores heat - until it… Repairs typically run $0-$1,500. Severity: medium.

What is the 2022-2025 Mercedes-Benz EQB AC Onboard Charger / Charge Port Phase Failure - 'Charging Process Interrupted'?

A recurring EQ-family fault where AC (Level 2) charging aborts partway through or refuses to start, while DC fast charging still works normally. The Mercedes me app reports 'charging process interrupted' and the session must be restarted manually, often repeatedly. On the EQB and… Repairs typically run $0-$1,800. Severity: medium.

What is the 2022-2023 Mercedes-Benz EQB Electric Drive Module Coolant Seal Leak Lowering HV Insulation Resistance?

A manufacturing deviation in the electric drive module left the cooling circuit inside the module inadequately sealed on a range of EQA, EQB and EQC vehicles, allowing coolant to seep into the motor housing. Over time the intruding coolant lowers the insulation resistance of the… Repairs typically run $1,500-$6,000. Severity: medium.

What is the 2022-2025 Mercedes-Benz EQB Real-World Range Significantly Below EPA Rating?

EQB owners consistently report real-world range 20-30% below the EPA-rated 243 miles, even in moderate weather. The boxy shape and higher weight of the three-row layout contribute to worse aerodynamic efficiency than the sedan-based EQ models, and highway range drops particularly… Severity: low.

What is the 2022-2025 Mercedes-Benz EQB Infotainment System Lag and Crashes?

The MBUX infotainment system in the EQB suffers from frequent lag, unresponsive touchscreen inputs, and occasional full system crashes requiring a reboot. The issue is worse after extended use and when multiple connected services are active simultaneously. Severity: low.

What is the 2022-2025 Mercedes-Benz EQB Brake Pedal Feel Inconsistency with Regenerative Braking?

The EQB exhibits inconsistent brake pedal feel as the system blends regenerative and friction braking. At low speeds and low battery state of charge, the transition between regen and friction braking creates a noticeable "dead zone" or sudden grab in the pedal, making smooth stop… Severity: low.