AI DamageMercedes-Benz G 550: problems, complaints, bulletins
Summary for the Mercedes-Benz G 550 across 15 model years: 27 owner complaints and 215 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
What fails most often
- 1 Electrical system 22% of all complaints
- 2 Engine 19% of all complaints
- 3 Suspension 15% of all complaints
- 4 Structure 7% of all complaints
- 5 Visibility 7% of all complaints
- 6 Steering 7% of all complaints
- 7 Fuel/propulsion system 7% of all complaints
- 8 Service brakes 7% of all complaints
- Electrical system: 6 complaints (22% of all); manufacturer bulletins for this component: 368.
- Engine: 5 complaints (19% of all); manufacturer bulletins for this component: 151.
- Suspension: 4 complaints (15% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 14.
- Structure: 2 complaints (7% of all); manufacturer bulletins for this component: 110.
- Visibility: 2 complaints (7% of all); manufacturer bulletins for this component: 41.
Symptoms owners describe
How many of the 27 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 6 | 0 | 368 |
| Engine | 5 | 0 | 151 |
| Suspension | 4 | 1 | 14 |
| Structure | 2 | 0 | 110 |
| Visibility | 2 | 0 | 41 |
| Steering | 2 | 0 | 40 |
| Fuel/propulsion system | 2 | 0 | 31 |
| Service brakes | 2 | 0 | 26 |
| Latches, locks, linkages | 2 | 0 | 9 |
| Fuel system | 2 | 0 | 5 |
| Electronic stability control | 2 | 0 | 0 |
| Powertrain | 1 | 0 | 157 |
| Forward collision avoidance | 1 | 1 | 19 |
| Tires | 1 | 0 | 5 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
Authorization failed Limited access is the reason there recalled I can't pair â¶
My suspension light came on while I was driving and my truch caught fire.
My 2017 G550 misfired on a highway and I had total failure with kids in the backseat creating an immediate life-safety hazard. This issue was caused by the M176 engine, which is known to create misfires.
The vehicle has fuel smell coming thru cabin vents. Opening the hood the vehicle also has strong fuel smell in engine bay. The hose supplying the fuel rails is cracked and damaged and does not have any heat sheild to prevent the hose from deteriorating.
I was driving on XXX in [XXX] on my way home from picking up my son from [XXX], when I noticed smoke coming from the dash while my suspension light came on. The right side of my car went down. A large amount of smoke started filling the car.
On this vehicle the oil pump-oil control valve has malfunctioned. The vehicle has 54000 miles on it and the repair costs $8500. The part is only $300 but the transmission must be removed to repair the vehicle. The safety of people is not compromised by the part. The malfunction has been confirmed by the dealer.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Suspension. Wheel alignment, control arms, subframe, even tire wear.
- Structure. Rails, pillars, panel gaps, signs of pulling or welding.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Complaint Clanking noise from the area of the speakers in the doors
- Complaint Customer complaints relating to automatic transmission 725.0 (NAG3 Classic /9G‑TRONIC automatic…
- Complaint Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE
- Complaint Noises in the steering column area when steering. See example file in the attachments area
- Complaint Only vehicles with a variable transfer case are affected
- Complaint CEL light on with no drivability concerns. Cause Signal timing error. Remedy 167, 465
- Complaint Customer complaints relating to automatic transmission 725.0 (NAG3 Classic / 9G‑TRONIC automatic…
- Cause Internal failure of the scroll wheel within the AC compressor
- Dear Mercedes-Benz Owner
- Complaint Consistently reproducible erroneous parktronic warnings from front with every key cycle
- Complaint Oil leaks found on M176 or M177 engines diagnosed to be from the cylinder head cover area Cause…
- Complaint A popup is seen on the HU with the message "data connection temporarily not available"
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.