What is the 2019-2020 Mercedes-Benz A-Class Front Axle Integral Carrier Corrosion (Steering Loss Risk)?

The integral carrier (front subframe component) that supports the front axle can corrode due to a manufacturing defect in which the parts did not receive proper corrosion protection. If the carrier corrodes severely it can fail, which may result in a loss of steering control. Thi… Repairs typically run $0-$1,500. Severity: high.

What is the 2019-2020 Mercedes-Benz A-Class Driver Front Airbag Module Not Properly Bolted to Steering Wheel (Recall 19V685)?

Early-production 2019-2020 A220 and A220 4MATIC (along with the 2020 CLA250 and several GLC variants) left the plant with driver's front airbag modules whose retaining bolts may not have been tightened to specification. In a frontal crash the module could shift or detach from the… Repairs typically run $0-$0. Severity: high.

What is the 2019-2025 Mercedes-Benz A-Class Driver Door Lock Micro-Switch Corrosion Disables Auto-Park Brake (Rollaway Risk)?

The micro-switch inside the W177 driver's door lock uses a housing that does not meet Mercedes' moisture-robustness requirement (a supplier manufacturing deviation). Humidity permeates the plastic housing and corrodes the switch contacts, so the car no longer detects the driver's… Repairs typically run $0-$0. Severity: high.

What is the 2019-2020 Mercedes-Benz A-Class M260 Fuel Rail / Injector Seal Particle Contamination Causing Fuel Leak (Recall 21V961)?

On certain 2019-2020 A220 and A220 4MATIC (M260 2.0L turbo) built in a narrow window, a foreign particle could be trapped between the fuel rail and the fuel injector during assembly, damaging the sealing surface. Under high-pressure direct-injection operation the damaged seal let… Repairs typically run $0-$1,800. Severity: high.

What is the 2019-2023 Mercedes-Benz A-Class DCT Transmission Shudder?

The 8G-DCT dual-clutch transmission develops a shudder during low-speed acceleration, similar to driving over rumble strips. The clutch packs overheat in stop-and-go traffic, causing judder and vibration during engagement. Repairs typically run $200-$3,000. Severity: medium.

What is the 2019-2021 Mercedes-Benz A-Class Rearview Camera Blank / No Image (FMVSS 111 Non-Compliance)?

NHTSA recall 21V-354 covers 2019-2021 A220 and 2020-2021 A35 AMG vehicles whose MBUX display may remain black or reboot, interrupting the rearview image. Recall 22V-232 covers 2019-2020 A220 and 2020 AMG A35 vehicles whose rearview-camera software may fail to display the image wi… Severity: medium.

What is the 2019-2023 Mercedes-Benz A-Class M282 1.3L Intake Valve Carbon Buildup?

The 1.3L turbocharged direct-injection M282 engine (co-developed with Renault, used in A180/A200) suffers carbon deposit buildup on the intake valves and ports because direct injection does not wash the valve backs with fuel. On urban/short-trip duty cycles deposits accumulate fr… Repairs typically run $300-$700. Severity: medium.

What is the 2019-2023 Mercedes-Benz A-Class Diesel Particulate Filter (DPF) Blockage and Limp Mode on Short Trips?

On diesel A-Class models (A180d/A200d/A220d, OM608/OM654 engines) driven mainly on short, low-speed urban trips, the DPF cannot reach the high exhaust temperatures needed for passive regeneration. Soot accumulates, the DPF/engine warning light illuminates, and the car can enter l… Repairs typically run $250-$800. Severity: medium.

What is the 2019-2023 Mercedes-Benz A-Class M282 Thermostat Housing / Coolant Leak?

The 1.3L M282 engine develops coolant leaks at the integrated thermostat housing/gasket and at the water pump and coolant hoses, commonly in the 55,000-70,000 mile range. A failing thermostat housing causes temperature gauge fluctuation, coolant loss, and slow cabin heating; if i… Repairs typically run $350-$900. Severity: medium.

What is the 2019-2022 Mercedes-Benz A-Class LED Headlamp Misadjustment / Incorrect Data-Matrix Coding (Recalls 21V509 and 23V662)?

Two separate headlamp non-compliance recalls hit the W177 in the US. Under 21V509 (2019-2020 A220 and other models) LED headlamps that had been replaced during a repair carried an incorrect data-matrix code, so the aiming/light-intensity setting programmed into the lamp did not m… Repairs typically run $0-$2,000. Severity: medium.

What is the 2019-2022 Mercedes-Benz A-Class eCall / SOS Communication Module Software Failure (Recalls 22V365 and 21V058, 'SOS Nonfunctional' Message)?

The W177's telematics communication module (HERMES) has been the subject of two US safety recalls plus several service bulletins. Under 21V058 (2016-2021 vehicles) the module's software could report an incorrect vehicle position to the emergency call center after a crash. Under 2… Repairs typically run $0-$0. Severity: medium.

What is the 2019-2023 Mercedes-Benz A-Class Auxiliary (Backup) Battery Malfunction Warning and 12V Standby Drain / No-Start?

The W177 carries a small auxiliary/backup battery (behind the passenger-side dash trim, not in the engine bay) that supports the electronic shifter, start-stop and MBUX during voltage dips. It has a short service life, and when its capacity falls the cluster shows 'Auxiliary batt… Repairs typically run $30-$500. Severity: medium.

What is the 2020-2023 Mercedes-Benz A-Class A250e Plug-in Hybrid Charging Interruptions and Failure to Reach Full Charge?

The A250e (W177/V177 with the M282 1.3L plus 75 kW electric motor, sold 2020 onward outside North America) has a recurring owner complaint that AC charging stops part-way: the charge cable's status light flashes red, the car shows a 'charging malfunction' message, and the tractio… Repairs typically run $0-$3,000. Severity: medium.

What is the 2019-2025 Mercedes-Benz A-Class MBUX Infotainment Software Bugs?

The MBUX infotainment system suffers from frequent software bugs including touchscreen lag, voice assistant failures ("Hey Mercedes" not responding), Bluetooth disconnects, and navigation freezes. The A-Class was the first Mercedes model with MBUX and received early software that… Repairs typically run $0-$500. Severity: low.

What is the 2019-2023 Mercedes-Benz A-Class Front Suspension Strut Noise?

The front MacPherson struts develop a clunking or knocking noise over bumps and rough surfaces. The strut mount bearing wears prematurely, and the strut itself can develop internal valving noise. More common on vehicles with AMG suspension. Repairs typically run $200-$1,000. Severity: low.

What is the 2019-2023 Mercedes-Benz A-Class Cabin Temperature Sensor / Overhead-Console Fan Dust Clogging Causing Climate Control to Blow Warm?

The W177's in-cabin temperature sensor sits in the overhead control panel and is ventilated by a tiny aspirator fan. That fan and the fine-wire sensor clog with dust, so the climate control believes the cabin is already cooler than the set temperature and stops requesting cooling… Repairs typically run $0-$600. Severity: low.

What is the 2019-2020 Mercedes-Benz A-Class Rear Brake Pad Wear Inspection Gauge Missing (Recall 23V732)?

2019-2020 A220 vehicles were delivered without the inspection gauge (and matching owner's-manual instructions) required to check rear brake pad wear, so owners and independent shops had no specified way to determine when the rear pads had reached the wear limit. The W177 rear bra… Repairs typically run $0-$700. Severity: low.

What is the 2019-2023 Mercedes-Benz A-Class Steering Column / Steering Wheel Grinding and Knocking Noises and Low-Speed Steering Vibration (Multiple TSBs)?

The W177's electric power steering column is the subject of a cluster of Mercedes service bulletins: LI46.10-P-077314 'Noises in the steering column area when steering', LI46.10-P-077313 'grinding noises between steering wheel and steering column' (steering column switch module/c… Repairs typically run $0-$2,000. Severity: low.

Mercedes-Benz · Known Issues

2020 Mercedes-Benz A-Class Problems: 22 Known Issues

2020 model year · 3,300+ owner reports · Updated September 2026

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According to Au7o's analysis of 3,300+ owner reports, the 2020 Mercedes-Benz A-Class has 22 documented known issues, with 6 rated critical. The most serious are A/C Drain Hose Water Ingress into Footwell (Electrical/SRS Damage) ($0-$1,200 repair), Front Axle Integral Carrier Corrosion (Steering Loss Risk) ($0-$1,500 repair), M260 Exhaust Valve Seat / Valve Guide Wear Causing Misfire and Cylinder Head Replacement (15yr/150k Warranty Extension) ($0-$7,000 repair), Driver Front Airbag Module Not Properly Bolted to Steering Wheel (Recall 19V685) ($0-$0 repair), Driver Door Lock Micro-Switch Corrosion Disables Auto-Park Brake (Rollaway Risk) ($0-$0 repair) and M260 Fuel Rail / Injector Seal Particle Contamination Causing Fuel Leak (Recall 21V961) ($0-$1,800 repair). The most commonly reported issue is MBUX Infotainment Software Bugs with 1,500 owner reports. Across all issues with published estimates, repair costs range from $30 to $7,000.

Frequently Asked Questions

What are the most common Mercedes-Benz A-Class problems?

According to Au7o's analysis of 3,300+ owner reports, the 2020 Mercedes-Benz A-Class has 22 documented issues. The most frequently reported are: A/C Drain Hose Water Ingress into Footwell (Electrical/SRS Damage), Front Axle Integral Carrier Corrosion (Steering Loss Risk), M260 Exhaust Valve Seat / Valve Guide Wear Causing Misfire and Cylinder Head Replacement (15yr/150k Warranty Extension). Of these, 6 are rated critical and should be addressed promptly.

Is the Mercedes-Benz A-Class reliable?

The 2020 Mercedes-Benz A-Class has 22 known issues documented across 3,300+ owner reports. 6 issues are rated critical: A/C Drain Hose Water Ingress into Footwell (Electrical/SRS Damage) and Front Axle Integral Carrier Corrosion (Steering Loss Risk) and M260 Exhaust Valve Seat / Valve Guide Wear Causing Misfire and Cylinder Head Replacement (15yr/150k Warranty Extension) and Driver Front Airbag Module Not Properly Bolted to Steering Wheel (Recall 19V685) and Driver Door Lock Micro-Switch Corrosion Disables Auto-Park Brake (Rollaway Risk) and M260 Fuel Rail / Injector Seal Particle Contamination Causing Fuel Leak (Recall 21V961). 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 A-Class problems?

Repair costs for known Mercedes-Benz A-Class issues range from $0 to $7,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, A/C Drain Hose Water Ingress into Footwell (Electrical/SRS Damage), typically costs $0-$1,200 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2019-2020 Mercedes-Benz A-Class A/C Drain Hose Water Ingress into Footwell (Electrical/SRS Damage)?

The air conditioning condensate drain hose may not be installed to specification, allowing water to drain into the driver/passenger footwells or center tunnel instead of overboard. Pooled water corrodes and short-circuits electrical control modules in the floor area (SAM, fuel pu… Repairs typically run $0-$1,200. Severity: high.

All 22 Known Issues

Other Mercedes-Benz Models

Frequently Asked Questions

What are the most common Mercedes-Benz A-Class problems?

Is the Mercedes-Benz A-Class reliable?

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

What is the 2019-2020 Mercedes-Benz A-Class A/C Drain Hose Water Ingress into Footwell (Electrical/SRS Damage)?

2019-2020 Mercedes-Benz A-Class: Driver Front Airbag Module Not Properly Bolted to Steering Wheel (Recall 19V685)#

2019-2025 Mercedes-Benz A-Class: Driver Door Lock Micro-Switch Corrosion Disables Auto-Park Brake (Rollaway Risk)#

2019-2021 Mercedes-Benz A-Class: Rearview Camera Blank / No Image (FMVSS 111 Non-Compliance)#

2019-2020 Mercedes-Benz A-Class: A/C Drain Hose Water Ingress into Footwell (Electrical/SRS Damage)#

2019-2022 Mercedes-Benz A-Class: eCall / SOS Communication Module Software Failure (Recalls 22V365 and 21V058, 'SOS Nonfunctional' Message)#

2019-2023 Mercedes-Benz A-Class: Auxiliary (Backup) Battery Malfunction Warning and 12V Standby Drain / No-Start#

2020-2023 Mercedes-Benz A-Class: A250e Plug-in Hybrid Charging Interruptions and Failure to Reach Full Charge#

2019-2025 Mercedes-Benz A-Class: MBUX Infotainment Software Bugs#

2019-2020 Mercedes-Benz A-Class: Front Axle Integral Carrier Corrosion (Steering Loss Risk)#

2019-2023 Mercedes-Benz A-Class: Steering Column / Steering Wheel Grinding and Knocking Noises and Low-Speed Steering Vibration (Multiple TSBs)#

2019-2023 Mercedes-Benz A-Class: M260 Exhaust Valve Seat / Valve Guide Wear Causing Misfire and Cylinder Head Replacement (15yr/150k Warranty Extension)#

2019-2023 Mercedes-Benz A-Class: M282 1.3L Intake Valve Carbon Buildup#

2019-2020 Mercedes-Benz A-Class: M260 Fuel Rail / Injector Seal Particle Contamination Causing Fuel Leak (Recall 21V961)#

2019-2023 Mercedes-Benz A-Class: DCT Transmission Shudder#

2019-2023 Mercedes-Benz A-Class: Diesel Particulate Filter (DPF) Blockage and Limp Mode on Short Trips#

2019-2023 Mercedes-Benz A-Class: M282 Thermostat Housing / Coolant Leak#

2019-2022 Mercedes-Benz A-Class: LED Headlamp Misadjustment / Incorrect Data-Matrix Coding (Recalls 21V509 and 23V662)#

2019-2023 Mercedes-Benz A-Class: Front Suspension Strut Noise#

2019-2023 Mercedes-Benz A-Class: Cabin Temperature Sensor / Overhead-Console Fan Dust Clogging Causing Climate Control to Blow Warm#

2019-2020 Mercedes-Benz A-Class: Rear Brake Pad Wear Inspection Gauge Missing (Recall 23V732)#

2019-2022 Mercedes-Benz A-Class: Interior Rattles: Dashboard/Center Display, Glovebox, B-Pillar Trim and Panoramic Roof Creaks#

2019-2021 Mercedes-Benz A-Class: Fuel System Control Module Software Fault (P146264 Fuel Pressure/Temperature Sensor Plausibility) - 15yr/150k Emission Warranty Extension#