2025 Mercedes-Benz GLS 450 4MATIC
Problems, Recalls & Reliability Report
Quick Summary
The 2025 Mercedes-Benz GLS 450 4MATIC has 12 owner complaints filed with NHTSA — that's 0.1x the segment average of 80. The most common issue is engine problems (17% of all complaints), specifically: the contact owns a 2025 mercedes-benz gls450 4matic. the contact stated that while driving at an undisclosed speed, the engine overheated, with several unknown warning lights illuminated. the vehicle was taken to the dealer, where it was diagnosed that the coolant pump had failed and needed to be re.
12
Total Complaints
0
Recalls Issued
—/5
Safety Stars
0.1x
vs Segment Avg
Known Problems
ENGINE
2 complaints- • The contact owns a 2025 Mercedes-Benz GLS450 4Matic. The contact stated that while driving at an undisclosed speed, the engine overheated, with several unknown warning lights illuminated. The vehicle was taken to the dealer, where it was diagnosed that the coolant pump had failed and needed to be re
- • The contact owns a 2025 Mercedes-Benz GLS450 4Matic. The contact stated that while driving at an undisclosed speed, the engine overheated, with several unknown warning lights illuminated. The vehicle was taken to the dealer, where it was diagnosed that the coolant pump had failed and needed to be re
“The contact owns a 2025 Mercedes-Benz GLS450 4Matic. The contact stated that while driving at an undisclosed speed, the engine overheated, with several unknown warning lights illuminated. The vehicle was taken to the dealer, where it was diagnosed that the coolant pump had failed and needed to be re”
— NHTSA complaint filing
BRAKES
2 complaints- • I am writing to file a formal complaint regarding a serious malfunction of the Automatic Emergency Braking (AEB) system. This malfunction caused my vehicle to unexpectedly perform an emergency stop without a valid cause, resulting in significant damage to its suspension system. Incident Details: •D
- • Brake pads completely worn after 11K miles - this seems like premature wear and like there is a potential issue with the braking system on the GLS450.
“I am writing to file a formal complaint regarding a serious malfunction of the Automatic Emergency Braking (AEB) system. This malfunction caused my vehicle to unexpectedly perform an emergency stop without a valid cause, resulting in significant damage to its suspension system. Incident Details: •D”
— NHTSA complaint filing
ELECTRICAL
2 complaints- • I am writing to file a formal complaint regarding a serious malfunction of the Automatic Emergency Braking (AEB) system. This malfunction caused my vehicle to unexpectedly perform an emergency stop without a valid cause, resulting in significant damage to its suspension system. Incident Details: •D
- • The contact owns a 2025 Mercedes-Benz GLS450 4Matic. The contact stated that while driving at various speeds, a safety feature with a white speed limit sign started flashing on the instrument cluster. The contact stated the flashing was a constant issue. The vehicle was taken to the local dealer sev
“I am writing to file a formal complaint regarding a serious malfunction of the Automatic Emergency Braking (AEB) system. This malfunction caused my vehicle to unexpectedly perform an emergency stop without a valid cause, resulting in significant damage to its suspension system. Incident Details: •D”
— NHTSA complaint filing
DRIVER ASSIST/CAMERAS
2 complaints- • Accident report: Local ID [XXX] Agency: ISPLowell 13 Date [XXX] Time approx [XXX] Milepost [XXX] on [XXX] Auto: 2025 Mercedes GLS 450 fully loaded Single car accident See attached pictures for damage State Farm insurance - claim filed (claim # [XXX]) Claim filed with Mercedes Benz on 3/9/2026 to acc
- • Accident report: Local ID [XXX] Agency: ISPLowell 13 Date [XXX] Time approx [XXX] Milepost [XXX] on [XXX] Auto: 2025 Mercedes GLS 450 fully loaded Single car accident See attached pictures for damage State Farm insurance - claim filed (claim # [XXX]) Claim filed with Mercedes Benz on 3/9/2026 to acc
“Accident report: Local ID [XXX] Agency: ISPLowell 13 Date [XXX] Time approx [XXX] Milepost [XXX] on [XXX] Auto: 2025 Mercedes GLS 450 fully loaded Single car accident See attached pictures for damage State Farm insurance - claim filed (claim # [XXX]) Claim filed with Mercedes Benz on 3/9/2026 to acc”
— NHTSA complaint filing
VISIBILITY
1 complaints- • The contact owns a 2025 Mercedes-Benz GLS450. The contact stated that while driving approximately 50 MPH, a loud popping noise had occurred, and suddenly the panoramic glass sunroof exploded, causing shards of glass to fall into the cabin of the vehicle. During the incident, shards of glass contacte
“The contact owns a 2025 Mercedes-Benz GLS450. The contact stated that while driving approximately 50 MPH, a loud popping noise had occurred, and suddenly the panoramic glass sunroof exploded, causing shards of glass to fall into the cabin of the vehicle. During the incident, shards of glass contacte”
— NHTSA complaint filing
Estimated Repair Costs
Estimates based on average reported repair costs. Actual costs vary by location, shop, and severity.
🔍 Pre-Purchase Inspection Checklist
Based on 12 owner complaints for this specific year, here's what to check or ask about:
- ☐ENGINE: The contact owns a 2025 Mercedes-Benz GLS450 4Matic. The contact stated that while driving at an undisclosed speed, the engine overheated, with several unknown warning lights illuminated. The vehicle was taken to the dealer, where it was diagnosed that the coolant pump had failed and needed to be re
Typically appears around 50K miles. Repair cost ~$500
- ☐BRAKES: I am writing to file a formal complaint regarding a serious malfunction of the Automatic Emergency Braking (AEB) system. This malfunction caused my vehicle to unexpectedly perform an emergency stop without a valid cause, resulting in significant damage to its suspension system. Incident Details: •D
Typically appears around 50K miles. Repair cost ~$500
- ☐ELECTRICAL: I am writing to file a formal complaint regarding a serious malfunction of the Automatic Emergency Braking (AEB) system. This malfunction caused my vehicle to unexpectedly perform an emergency stop without a valid cause, resulting in significant damage to its suspension system. Incident Details: •D
Typically appears around 50K miles. Repair cost ~$500
- ☐DRIVER ASSIST/CAMERAS: Accident report: Local ID [XXX] Agency: ISPLowell 13 Date [XXX] Time approx [XXX] Milepost [XXX] on [XXX] Auto: 2025 Mercedes GLS 450 fully loaded Single car accident See attached pictures for damage State Farm insurance - claim filed (claim # [XXX]) Claim filed with Mercedes Benz on 3/9/2026 to acc
Typically appears around 50K miles. Repair cost ~$500
- ☐General: Get a pre-purchase inspection from an independent mechanic ($100-$200)
Mercedes-Benz GLS 450 4MATIC — Year Comparison
How does 2025 compare to other years? Fewer complaints = more reliable.
Full years-to-avoid analysis →NHTSA Safety Rating
No NHTSA safety rating available
At a Glance
- Complaints
- 12
- Recalls
- 0
- Fire reports
- 0
- Crash reports
- 3
- Injury reports
- 2
- Segment avg
- 80
Check a Specific VIN
See recalls for YOUR 2025 Mercedes-Benz GLS 450 4MATIC