2021 Mercedes-Benz GLS 450 problems
The 2021 Mercedes-Benz GLS 450 has 42 complaints on file with NHTSA. The largest share (33%) concerns electrical system. After that come lane departure (10%) and engine (7%).
At a glance
- Complaints
- 42 filed with NHTSA
- Most reported
- Electrical system 33% of complaints
- Crashes and fires
- 1 and 4
- Injuries and deaths
- 1 and 0
Source: NHTSA owner complaints
Where the complaints are
Share of this model year's complaints by the part of the car involved. One complaint can name more than one part, so the shares can add up to more than 100%.
What the data shows
Safety-related details: 1 complaint mentions a crash; 4 complaints mention a fire; 1 injury reported.
Looking only at complaints filed within five years of the model year (so older and newer years are comparable), the 2021 ranks 2nd most-complained-about out of 4 model years of the Mercedes-Benz GLS 450 with enough data (42 complaints in that window). It is also covered by 12 safety recall campaigns.
What owners wrote
A few complaints as filed, shortened and with personal details removed. The first ones are among the most serious reports for this model year; the rest are typical.
1. Unknown, smoke started coming from under the passenger side seat, car is a complete loss. 2. Smoke damaged my lungs, there was a large amount of exploding glass, and it could have led to a structure fire. 3. Not applicable 4. In process, but it was recalled for this issue 5. No
I was driving only 30mph through my suburban neighborhood bringing my kids to school in the morning when a loud shotgun sound hit my car causing me to be distracted and distraught. My entire sunroof had exploded on me for no reason. Mercedes is currently undergoing a class action lawsuit for this. But since it is not completely yet, I’m being told I need to pay $3700 out of pocket for the default damages and servals days without a vehicle.
The contact owns a 2021 Mercedes Benz GLS450. The contact stated while driving 75 mph with the cruise control engaged, the vehicle decelerated to 45 mph than to 15 mph. On another occasion, while driving 80 mph, the vehicle independently decelerated to 45 mph. There was no warning light illuminated. The vehicle was taken to the local dealer however, the mechanic was unable to duplicate the failure. The vehicle was not diagnosed nor repaired.
The contact owns a 2021 Mercedes-Benz GLS450. The contact stated while driving 40 MPH, the vehicle in front made a sudden stop, causing the contact to make a sudden stop, causing the contact’s children to fall out the seats. The contact notice that the third-row buckle latch had malfunctioned. The vehicle was taken to the dealer and the third-row driver’s side latch was replaced. On another occasion while driving 40 MPH, the contact heard squeaking noise coming from the rear of the vehicle.