AutoUtility currently tracks 34 official NHTSA owner defect complaints for the 2015 Mercedes-Benz GL-Class. Engine & Cooling issues are the most frequently reported category, appearing in 15 complaints (44.1% of submitted records). Among these NHTSA complaint records, 2 filings cite a crash, 3 cite a fire, 1 reports one or more injuries.
Factual proportion of owner complaints categorized by automotive subsystem in NHTSA records
15 owner complaints submitted to NHTSA ODI for this subsystem.
4 owner complaints submitted to NHTSA ODI for this subsystem.
4 owner complaints submitted to NHTSA ODI for this subsystem.
3 owner complaints submitted to NHTSA ODI for this subsystem.
Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation
"See attached document for complaint."
"My 2015 Mercedes-Benz GLE 450 experienced an unexpected vehicle fire on Feb 13th 2026. The vehicle was just parked when I noticed smoke from the engine. The vehicle caught fire within a short period of time, and 911 was called. There was no known external cause for the fire. The incident appeared..."
"My 2015 Mercedes-Benz GL63 AMG has suffered two separate ECU failures caused by oil migrating through the engine wiring harness. The first failure occurred at ~42,600 miles in 2020, and the second at ~59,000 miles in 2023. Both times, the vehicle developed misfires, check-engine warnings, and..."
"To Whom It May Concern: I am writing to formally request the National Highway Traffic Safety Administration’s assistance regarding a critical safety defect in my 2015 Mercedes‑Benz GL 450 (M278 engine). I purchased this vehicle in October 2024 with 76,000 miles, and it now has about 87,000 miles...."
"The contact owns 2015 Mercedes-Benz GL450. The contact stated that the check engine warning light was illuminated. The vehicle was taken to the dealer, where DTC code: P060A00 was retrieved. The dealer determined that the solenoid valve had failed and needed to be replaced. The contact related the..."
Reported defect complaint volume across sibling model years (2015–2016)
| Model Year | NHTSA Complaints | Crash Reports | Safety Recalls | Detailed Report |
|---|---|---|---|---|
| 2015 Mercedes-Benz GL-Class Current Page | 34 | 2 | 0 | Current |
| 2016 Mercedes-Benz GL-Class | 20 | 1 | 1 | View 2016 Problems → |
Complete distribution of consumer defect reports across all 16 granular NHTSA system and subsystem classifications
| Vehicle Component / System | Total Complaints | Crash Reports | Fire Reports | Injury Entries | Fatality Entries |
|---|---|---|---|---|---|
| Engine NHTSA category: ENGINE | 8 | 0 | 1 | 1 | 0 |
| Seats & Restraints NHTSA category: SEATS | 4 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,ENGINE | 3 | 0 | 0 | 0 | 0 |
| Other / Uncategorized NHTSA category: UNKNOWN OR OTHER | 3 | 0 | 0 | 0 | 0 |
| Fuel & Propulsion System NHTSA category: FUEL/PROPULSION SYSTEM | 2 | 0 | 0 | 0 | 0 |
| Suspension NHTSA category: SUSPENSION | 2 | 0 | 0 | 0 | 0 |
| Vehicle Speed Control NHTSA category: VEHICLE SPEED CONTROL | 2 | 1 | 0 | 0 | 0 |
| Visibility & Wipers NHTSA category: VISIBILITY/WIPER | 2 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,STRUCTURE,ENGINE | 1 | 0 | 0 | 0 | 0 |
| Engine & Cooling NHTSA category: ENGINE AND ENGINE COOLING | 1 | 0 | 0 | 0 | 0 |
| Doors, Latches & Locks NHTSA category: LATCHES/LOCKS/LINKAGES | 1 | 0 | 0 | 0 | 0 |
| Powertrain NHTSA category: POWER TRAIN | 1 | 1 | 0 | 0 | 0 |
| Steering NHTSA category: STEERING | 1 | 0 | 0 | 0 | 0 |
| STRUCTURE,UNKNOWN OR OTHER,ENGINE | 1 | 0 | 1 | 0 | 0 |
| SUSPENSION,POWER TRAIN,ELECTRONIC STABILITY CONTROL (ESC) | 1 | 0 | 0 | 0 | 0 |
| UNKNOWN OR OTHER,ENGINE | 1 | 0 | 1 | 0 | 0 |
Cross-reference safety recalls, crash test safety ratings, and EPA fuel economy for this model year
Key performance indicators, EPA fuel economy specs, powertrain variants, and summary ratings.
Official recall campaigns, safety defect descriptions, and manufacturer free remedy instructions.
NHTSA 5-Star NCAP crash test results, driver assistance systems, and rollover resistance ratings.
EPA fuel economy ratings, electric range, and annual energy cost benchmarks.
Direct, deterministic answers synthesized from verified United States government databases for the 2015 Mercedes-Benz GL-Class
In official NHTSA consumer records, the most frequently cited issue area for the 2015 Mercedes-Benz GL-Class is Engine & Cooling, appearing in 15 records (44.1% of submitted filings).
Secondary reported categories include Electrical System (4) and Seats & Interior (4).
AutoUtility does not issue subjective reliability scores or commercial ratings. In official United States government records, NHTSA tracks 34 consumer defect complaints and 0 safety recall campaigns for the 2015 Mercedes-Benz GL-Class.
Reviewing documented component complaint distributions, recall remedy notices, and active federal investigations provides an objective, evidence-based view of the vehicle's historical safety and defect record.
Among consumer complaint records on file with NHTSA for the 2015 Mercedes-Benz GL-Class, 2 filings cite a crash, 3 cite smoke or fire, and 1 report one or more injuries.
Incident entries represent consumer descriptions at the time of submission to federal authorities and do not establish mechanical causation or legal liability.
The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database under 49 CFR Part 576.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.