Inside the car smells gas either idle or running. Dashboard lights flactuate and sometimes the gas gage doesn't show how much fuel you have left. Command system shuts off after 3 mins even the engine is on. But mainly, the gas smell in the car. Have trouble breathing at times and I don't haveany underlying condition.

- Buckeye, AZ, USA

P052E: Positive Crankcase Ventilation Regulator Valve Performance. It is available for inspection upon request. It was a problem that was confirmed by two independent service centers. It first appeared at around 30k miles, then the engine light disappeared. At around 40k, it starts to intermittently appears and disappears, most of the time the engine light was off, my mechanics checked at it, said it was not uncommon to see this problem with Mercedes and said it won't affect driving. At around 50k it starts to appear more often, still intermittently. I got a second opinion with another mechanics, was told again that he saw this happening commonly with Mercedes. Crankcase alone cannot be replaced, I'll need to replace the whole thing which part cost 750+, with 1200+ labor at an independent service center, and the local mercedes dealer quote double the price.

- Fairfield, CT, USA

I was driving on the street and lost power, I looked down and saw a red transmission message and noticed that my vehicle was in neutral. I hurried, and stepped on the break and put my car in drive. I drove 5 minutes to my destination. A few hours later, as I was leaving my destination, my car did the same thing. I lost power, the red transmission light popped up and my car was in neutral. I noticed it once a few months ago and thought it was minor. As I reflect, I have had a few instances where I was driving and my acceleration was off. I took the streets to the mechanic today and they stated that they could not find anything wrong with the car.

- Van Nuys, CA, USA

The panoramic sunroof failed to close after it was opened. I attempted to close the sunroof after use and it stayed open. This is concerning as debris could have flown into the car and impaired operation. Another concern is the short-circuiting/fire risk of the internal wiring and components in the event of rain. We took the car to the dealership where an associate told us that this is a common problem with CLA class cars. This was the only inspection of the car thus far. There were no messages or warnings prior to the failure.

- Duluth, GA, USA

My radio completely turned off & the whole colonization system is shut down. I cannot control anything like changing the time or lights in my car & I have no working screen. The screen is completely black & nothing turns on or works. It randomly turned off one day & hasn-€™t come back on. I took it to the dealership & they want me to pay $2,500 to get it fixed. I did not cause this issue, the car itself caused this. I do not think I should have to pay for something I did not cause.

- Murphy, TX, USA

Automatic start /stop failed on highway car would not move, almost caused an accident. This has been repaired twice and now it has happened again. CLIENT STATES VEHICLE CUTS OFF AT IDLE Cause:. Correction: 540650 ON-BOARD POWER SUPPLY VOLTAGE MAINTAIN (WHEN CHECKING/ TESTING AND TROUBLESHOOTING) Tech Number: 20 Labor Type: WNC8 541011 PERFORM QUICK TEST Tech Number: 20 Labor Type: WNC8 275002 REPLACE ELECTROHYDRAULIC CONTROLLER UNIT OF DUAL-CLUTCHTRANSMISSION Tech Number: 20 Labor Type: WNC8 272388 REPLACE CONTROL UNIT OF DUAL- CLUTCH TRANSMISSION (ELECTROHYDRAULIC CONTROLLER UNIT REMOVED) ON VEH. WITH Tech Number: 20 Labor Type: WNC8 540991 PROGRAM AND CODE CONTROL UNIT.................... (AFTER QUICK TEST) Tech Number: 20 Labor Type: WNC8 271254 CHECK/CORRECT OIL LEVEL OF DUAL-CLUTCH TRANSMISSION (AFTER LEAK TEST) Tech Number: 20 Labor Type: WNC8 271048 ADAPTATION PERFORM (AFTER REPAIRS)

- Trenton, NJ, USA

Unknown accelerated out of driveway, turning left. Collision with object deemed vehicle total loss. No airbag deployed, front end collision.

- Bloomington, IL, USA

Automatic engaging of emergency break while driving or stationary together with signals of collision prevention assistant plus inoperative and two other errors (in pictures). Car was bought recently bought and delivered to me on January 1st, 2020. It has been taken back to dealer twice for same errors. It was replaced the battery twice as dealer indicated it had to do with auxiliary battery malfunctioning which was also another error showing in the panel.

- Miami, FL, USA

I purchased the vehicle January 2019, the vehicle was running smooth for a couple months. Now it is January 2020 and between the months of September and now I have been to Mercedes about 4 times. The car doesn't reverse sometimes while I am driving. The words 'car cannot reverse' comes up on the dashboard. I couldn't use the heat in November due to a gas smell coming in the car. Sometimes I will be in gear 3 and the car will change to gear 5 on its own. As of right now there is a burning smell surrounding the vehicle when you are done driving it.

- Brooklyn, NY, USA

I leased this vehicle end of September 2016 but have replaced tires 6 times within last two years due to bubble in side of the tires. I don't think it is issue with tires since I have 2016 BMW with same tires without any issues. It could the rim size or the suspension on this vehicle cause tires to bubble up. I have been leasing cars for 30 years and never had issues like this. Numerous time I have asked the dealer to find out the root cause for it but no luck so far. The issue here is it putting myself and my family danger of our life because it is happening without even going thru a pot hole.each time when it happened, it is causing me to spend 350 to replace each tire. The transmission also failed last week while I was driving on a highway but lucky I was able to pull to a side without getting hit by another car.the transmission should not fail when the car only have $37,000 miles. I am not sure if any other complains was files regarding the same issues. I want Benz to replace these tires at free of cost till they find out the issue and fix it.

- Belle Mead, NJ, USA

The sunroof spontaneously exploded with a large noise raining glass down on us. There were no cars around, no objects hit the sunroof. We were driving at normal speed on the highway. This issue is very dangerous because it was startling like an explosion and could have caused loss of control. The car had very low mileage was practically brand new in perfect condition.

- Los Altos Hills, CA, USA

*** I don't own this car. *** Mercedes sent the remote access credentials to an unverified email account. The remote access app shows vehicle location, allowing unlock and vehicle start which could allow the vehicle to be easily stolen. Also I fear that by not securely sending remote access credentials the remote start feature of the app could be used to start the vehicle when it is parked in an attached garage which could inundate the house with carbon monoxide. Mercedes needs to verify owner email prior to sending vehicle access credentials. Additionally steps should be taken to ensure that remote start features cannot cause harm to owners in case online accounts are hacked such as the recent yahoo email fiasco: * limit the amount of time a vehicle can be left running. * limit the number of times a vehicle can be remote started in a row. * add a carbon monoxide detector to the vehicle so it will shut itself down if running in an enclosed space. * require 2 factor authentication when logging into remote apps, perhaps only the first time?

- Madison, WI, USA