Home · 2018 Mercedes-benz CLA · Complaints

What 44 owners told NHTSA about the 2018 Mercedes-benz CLA

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (44)Crash / fire / injury (2)Electrical system (12)Engine (9)Airbags (7)Body & structure (6)Transmission & drivetrain (4)Fuel system (3)Communication (2)Seats (2)Steering (2)Electronic Stability Control (esc) (1)

Newest first · 44 complaints · page 1 of 2

May 16, 2026Electrical system

The instrument cluster gauges start giving in accurate information and the whole dash start turning on and off. I found hundreds of people posting complaints about this issue with the 2018 mercedes cla 250 but mercedes refuses to acknowledge this issue and put out a recall probably out of greed and to not loose money. This is a dangerous issue. Mercedes wants to charge people appropriately $3,000 for parts and labor to fix this issue which is ridiculous. Please look into this. There needs to be a recall. This is dangerous especially for the people that cant afford this repair.

NHTSA ODI 11738287

May 16, 2026Body & structure

Water coming into the car through the floor

NHTSA ODI 11738289

Mar 8, 2026Engine

Corrosion of the fuel system (on a Flex Fuel rated vehicle that had used E85 blend regularly) causing sudden loss of power, misfires, lack of acceleration The vehicle experience sudden loss of power, multiple misfires, and potential damage to the engine. Had the vehicle been on the highway or attempting to merge with traffic this could have resulted in an accident See attached dealer diagnosis and replacement of multiple fuel injectors, fuel pump, and fuel rail. The dealer service manager stated (but did not document) that this was probably caused by using E85, despite the fact that the vehicle is rated for E85/flex fuel There were no warnings or indications prior to the incident

NHTSA ODI 11722825

Nov 13, 2025Electrical system

I have sent the below email over 100 times to Mercedes To whom it may concern, I am writing regarding the purchase of a CLA250 4matic in December. I had a 120 point inspection done that did not show any issues with this car. As I was driving down a dark road around 1 am, my life was thrown in danger as the command shaft shut off and I could not see the dashboard or any lights in the vehicle. I was alone and on a dark road. After sitting for 15 minutes, I was able to get a light to come on and drove to my destination. On my way home, the lights were acting erratic and the brake lights, bright lights, engine lights, gas gauge, rpm gauge and caution lights were flickering the entire time. The car had no problems starting, however this continued to happen. I parked the car for several days and after starting it again, the dashboard was black, I could not see to put it in park. I tried several days later and got the lights to come on and after driving through the light, the parking brake was thrown in place as I was driving, almost ejecting me from this vehicle. I immediately turned around and parked the car for over a week until bringing it to your service location at Atlanta South. The car put my life in danger, almost ejecting me out of the car. Thankfully I was not on the highway driving higher speeds or I would have been killed.. I am asking for Mercedes Benz to cover the entire amount for the command which I was told during service check was defective and wiring issues within the command. The cost is over $2,900. I believe this is a manufacturing defect whether you have any recalls on it or not. I will file a safety recall complaint with the NHTSA Nation vehicle recall for these vehicles of this make and model advising that you could be killed while driving this car without further recall. I have had other Mercedes benz vehicles and never had this problem. This is a matter of life or death. The car is currently parked at the dealer after inspection.

NHTSA ODI 11699248

Nov 5, 2025Airbags

The contact owns a 2018 Mercedes-Benz CLA250. The contact stated that while driving and turning the steering wheel to the left, there was an abnormal clicking sound coming from the vehicle. Additionally, the electrical features on the steering wheel failed to operate as needed. The contact stated that several days later, the same failure returned with air bag and a "Front Left Malfunction - Service Required" message displayed on the instrument panel. The contact spoke to her mechanically inclined brother and was informed that the failure was likely related to a defective clock spring. Upon investigation, the contact discovered NHTSA Campaign Number: 17V627000 (Air Bags) ,which the contact linked to the failure. The contact went to the local dealer's website and communicated with an agent through the Live Chat feature. The contact was informed that the vehicle was not included in the recall. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

NHTSA ODI 11697599

Sep 24, 2025Airbags

My clock spring is no longer working, it made all the buttons on my steering wheel stop working and i am afraid the airbag will deploy at random since there was a recall on cla models 2015-2018. I own a Mercedes cla 250 2018 but it is not showing a recall on my specific vehicle. Not only that but they no longer sell just the clock spring for my car, im assuming because of the recall. I am scared that my airbag will randomly deploy while im driving or that it will not deploy at all in case of an accident. It was diagnosed by an independent mechanic There was no other messages except when my left side airbag service needed message popped up

NHTSA ODI 11689310

Aug 20, 2025Engine

P052E Check Engine light on. Same part is defective on other models that use the same parts. My car is not included in the recall.

NHTSA ODI 11681776

Jul 28, 2025Electrical system

The panoramic sunroof opens and closes but will not shut completely in the back. When calling around for a quote mechanics were aware of the issue occurring with this specific make model and class of vehicle.

NHTSA ODI 11676772

Jun 25, 2025

When you start off at a slow speed, the rear end of the car starts making a knocking noise. We had it inspected by Mercedes-Benz and they said that it is the rear differential.

NHTSA ODI 11669091

Apr 11, 2025Fuel system

Crank venting system. Wheel looses power. Oil us getting into sensors.

NHTSA ODI 11654157

Feb 8, 2025SteeringAirbags

My car clock spring has went out, and it affects my car airbag deploy. I see it’s a problem with the Mercedes Cla250. It’s very dangerous it causes your horn not to work as well!

NHTSA ODI 11641460

Jan 30, 2025Visibility & wipers

The contact owns a 2018 Mercedes-Benz CLA250. The contact stated that while the vehicle was parked, the sunroof switch was enabled to open the sunroof; however, the sunroof failed to open as intended. The contact stated that the left side of the sunroof did not open as intended. The vehicle was taken to the dealer where it was diagnosed with sunroof assembly failure. The contact was informed that the sunroof assembly needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was unknown. The VIN was unavailable.

NHTSA ODI 11639713

Jan 28, 2025Body & structure

Within 2 weeks after purchasing this vehicle the front stationary roof panel flew off the car. I noticed it when I parked at work in the parking lot. I do not know where the panel is. I retraced my route and did not see it anywhere. I work less than 2 miles from work with no turns. I am very concerned that the panel may cause water damage/leaking and even be a danger / damage to another drivers safety. I went to MB they said that there was no recall. They said that I should file claim to repair it. Claim and repair done be MB. NOW the same thing happened again. The panel has flown off again while I was driving on the highway around 3:00pm the panel nowhere to be found. MB said file a claim. 2 repair companies said the glue /sealant could be the issue. There were no notifications that this would happen. Pictures have been taken for both incidents. Upon referencing Vehicle Compliance & Analysis there is a recall Campaign Description: 23P2197658 NHTSA ID 23V854 I am having a difficult time getting my vehicle repaired without having to file another claim or paying for it myself.

NHTSA ODI 11639023

Jan 23, 2025Body & structure

The contact owns a 2018 Mercedes-Benz CLA250. The contact stated that while the vehicle was at the car wash, water entered through the overhead center console. The vehicle was taken to the dealer, where it was determined that the front roof panel needed to be replaced and resealed. The vehicle was not repaired. The manufacturer was made aware of the failure but informed the contact that there was no recall associated with the VIN. The failure mileage was approximately 61,050.

NHTSA ODI 11638024

Dec 11, 2024Body & structureSeats

Water comes in the car and fills the back seat floors with water. I think its comming in from the frame.

NHTSA ODI 11630127

Nov 19, 2024Engine

Check engine code PO52E - Positive Crankcase Ventilation regulator valve performance. Needs to be recalled

NHTSA ODI 11626114

Oct 28, 2024Engine

I am driving around 55K miles in this car, and my check engine light comes up. I head to a local place to get a code check. The guy looks it up and tells me this is pretty much with EVERY Mercedes CLA around that mile point.. So, I look up on reddit and other forums, and it's exactly what he said. Pretty much the PCV valve is faulty and costs around $1800-2500 to fix after 50-60K miles which causes emission problems and other safety concerns if not taken care of. It makes no sense how this is not a recall. Of what I read, Mercedes knows all about this and has done nothing, just leaving the drivers to take care of a problem that they did nothing to cause. I am not sure if this is for the NHTSA or what, but it is kind of unacceptable.

NHTSA ODI 11622361

Sep 5, 2024Transmission & drivetrain

My 2018 Mercedes-Benz CLA250 4MATIC is experiencing a knocking noise from the rear differential at low speeds. The issue poses potential driving hazards, including possible loss of control and increased wear on drivetrain components. The noise may indicate a failing differential, which could suddenly fail while driving. I have contacted the dealer, but no specific recalls or factory service announcements have been identified for this problem. This appears to be a common issue reported by other owners. At the recommendation of the service technician, I replaced the rear solenoid, at the cost of $400, but no improvement. A rebuild of the rear differential was the recommendation.

NHTSA ODI 11612753

Sep 2, 2024Airbags

Air says it will malfunction nothing has happened but wish for it to be repaired before an accident

NHTSA ODI 11612161

May 11, 2024Body & structure

roof front panel coating peeling off - there has been a recall for this issue on most mercedes benz of my year - not just my model- seems to consistently be an issue for the front panel between windshield and sunroof- https://static.nhtsa.gov/odi/rcl/2021/RCMN-21V197-6244.pdf my specific VIN wasnt included in the recall but i am having the exact same issue- Mercedes told me to reach out to NHTSA to see about getting my VIN batch included in recall or re-issue broader recall to include my VIN # - they will not replace otherwise - so many people online have same issue as me and obviously it was enough of a hazard that the first recall was issued but there are more cars affected by it than what was covered.

NHTSA ODI 11588237

Feb 20, 2024Electrical systemLane Departure

Vehicle cluster lights go black while driving...dangerous due to no fuel gauge..no speed gauge... no speedometor..no seat belt warning and no blinkers to exit highway safely....there is a danger of crashing as vehicles goes hesitant during black periods...this is an ongoing problem with Mercedes as documented for numerous years with numerous vehicle's and different models. The safety of my driving this vehicle has come down to your ethics.. Does Mercedes value their customer [I think not] or does the safety of Highway Patrol ignore this dangerous and catastrophe accident waiting to happen.? I really hope someone will be helpful and I do really appreciate your time to this issue...

NHTSA ODI 11573041

Jan 9, 2024Electrical system

The cluster panel lights that indicate speed, fuel, brakes, lights, turn signal, engine light, high beams and all other components of safety of car continue to black out altogether or flash on and off continuous while driving. Safety is an issue if your driving and cluster panel blacks out. You do not know the speed your driving at and no turn signals work. The problem was reported to Mercedes and the software was reset. The problem continues to happen while driving and is dangerous on highways as speedometer and turn signals do not work. Gas gage spins from full to empty and brake and engine lights flash on and off or cluster again goes black. There are or have never been warnings. While driving it just happens. This has been happening on and off for a few months. Mercedes does not know the cause.

NHTSA ODI 11564453

Jan 8, 2024Airbags

The year and model of my car has been recalled for a steering column module/clock spring. Mercedes says my VIN is not in the recall. This is a safety concern as an airbag will not deploy. I believe I should be included in the recall.

NHTSA ODI 11564288

Dec 26, 2023Body & structure

roof front panel coating peeling off - there has been a recall for this issue on most mercedes benz of my year - not just my model- seems to consistently be an issue for the front panel between windshield and sunroof- [XXX] my specific VIN wasnt included in the recall but i am having the exact same issue- Mercedes told me to reach out to NHTSA to see about getting my VIN batch included in recall or re-issue broader recall to include my VIN # - they will not replace otherwise - so many people online have same issue as me and obviously it was enough of a hazard that the first recall was issued but there are more cars affected by it than what was covered. have tried to upload photos but the button dissapears when i click on upload [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11561932

Nov 3, 2023Fuel system

The contact owns a 2018 Mercedes-Benz CLA250. The contact stated while driving an undisclosed speed, an abnormally strong fuel odor was detected. Additionally, the fuel odor was also detected when the defroster and heat were activated. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure but informed the contact that there was no recall associated with the VIN. The contact related the failure to NHTSA Campaign Number: 21V961000 (Fuel System, Gasoline) however, the VIN was not included in the recall. The failure mileage was approximately 55,000.

NHTSA ODI 11553361

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Working with the data? Download all 44 complaints as CSV · fetched from NHTSA July 19, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2018 Mercedes-benz CLA verdict →