What breaks most · 2007 to 2017 model years
Mercedes-Benz CLS550 problems by year
Owners have filed 61 safety complaints with NHTSA about the Mercedes-Benz CLS550 across model years 2007 to 2017. Three years stand out: 2007 for fuel system complaints, 2008 for fuel system complaints and 2012 for electrical system complaints. The quietest years are 2013, 2009 and 2011.
- Years to check closely: 2007, 2008, 2012
- Fewest complaints: 2013, 2009, 2011
- Complaints on file
- 612007 to 2017, all trims
- Worst year
- 200731 complaints
- Crashes reported
- 31 fires · 9 injuries · 0 deaths
- Typical failure mileage
- 59kMedian where owners gave mileage
- Recall campaigns
- 24Across the years shown
Complaints by model year
Raw filings with NHTSA, not adjusted for how many were sold.
| Model year | Complaints | Crashes | Recalls | Most-reported component |
|---|---|---|---|---|
| 31 | 0 | 4 | Fuel system (16) | |
| 10 | 0 | 3 | Fuel system (4) | |
| 4 | 1 | 3 | Tires (1) | |
| 4 | 0 | 3 | Seats (1) | |
| 7 | 1 | 3 | Electrical system (2) | |
| 1 | 0 | 3 | Seat belts (1) | |
| 3 | 1 | 4 | Air bags (1) | |
| 1 | 0 | 1 | Wheels (1) |
What fails on the 2007 Mercedes-Benz CLS550
| Component | Share of complaints | Filings | Crashes | Parts for this job |
|---|---|---|---|---|
| Fuel systemFuel pumps and injectors | 52% |
16 | 0 | Shop fuel system parts for the 2007 Mercedes-Benz CLS550 |
| Fuel systemFuel pumps and injectors | 26% |
8 | 0 | Shop fuel system parts for the 2007 Mercedes-Benz CLS550 |
| Powertrain and transmissionTransmission parts | 10% |
3 | 0 | Shop powertrain and transmission parts for the 2007 Mercedes-Benz CLS550 |
| Unknown or other | 6% |
2 | 0 | — |
| Engine and coolingRadiators, thermostats and cooling | 6% |
2 | 0 | Shop engine and cooling parts for the 2007 Mercedes-Benz CLS550 |
| VisibilityMirrors and glass | 3% |
1 | 0 | Shop all visibility parts, not filtered to this vehicle |
| Speed control and throttleThrottle and pedal sensors | 3% |
1 | 0 | Shop speed control and throttle parts for the 2007 Mercedes-Benz CLS550 |
| Tires | 3% |
1 | 0 | — |
One complaint can name more than one component, so shares add to more than 100%. "Unknown or other" is NHTSA's uncategorized bucket and is shown but never ranked.
In owners' words
Complaint narratives as filed with NHTSA, trimmed for length.
-
I owned 2007 mercede cls550. I notes a strong gas smell inside and out side the car after i fill it up. I replaced the fuel cap but no help. Fumes fill up my car and my garage every time i fill up now.
-
Leaking fuel around the fuel sending unit under rear seat behind driver, filling the passenger compartment with gasoline fumes, after filling the car up with gasoline.
How to read this page
Every figure comes from the National Highway Traffic Safety Administration's public complaint database, which holds every safety-related defect complaint filed by owners since 1995. We refresh it monthly and count each complaint once per component it names. Data through September 30, 2026.
NHTSA only accepts safety-related complaints. Rattles, paint, infotainment bugs and other annoyances are under-reported here, so this page is a map of what fails in ways owners consider dangerous, not a full reliability score.
Counts are raw. Use the year-over-year shape and the component mix, not the absolute numbers. Where a component maps to parts we stock, the row links to that category filtered to the year you are viewing. Air bag and seat belt complaints link to the recall checker instead, because those repairs are almost always covered.
Common questions
Which Mercedes-Benz CLS550 years have the most problems?
By NHTSA complaint volume, 2007, 2008, 2012 carry the most filings on the Mercedes-Benz CLS550. The 2007 alone has 31 complaints, led by fuel system.
What is the most common Mercedes-Benz CLS550 problem?
On the 2007 model year, the most-reported component is fuel system with 16 complaints. The table above lists the top components for every year.
At what mileage do Mercedes-Benz CLS550 problems start?
The median mileage at failure across all Mercedes-Benz CLS550 complaints that include mileage is about 59,000 miles. Older model years skew higher; the per-year figure is in the "at a glance" card.
Are these complaints verified?
No. NHTSA publishes complaints as submitted and does not investigate individual filings. Patterns across hundreds of complaints are meaningful; a single one is not.