Total Complaints
3 filings
MERCEDES-BENZ S CLASS · model year
2009 MERCEDES-BENZ S CLASS
3 NHTSA complaints, 2 crash reports for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2009MERCEDES-BENZS CLASS carries 3 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 2 crashes, 0 fires, 0 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2009 S CLASS is service brakes, hydraulic with 1 filings, followed by air bags (1) and latches/locks/linkages (1). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.
NHTSA currently has 1 investigation file overlapping the 2009 S CLASS. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
3
Complaints
2
Crashes
0
Fires
0
Injuries
0
Deaths
Crashes Reported
2 reports
Source
NHTSA ODI
Federal complaints database
Complaints vs. fleet median (215)
At or below the fleet median complaint volume.
Complaints by Component
| Component | Count |
|---|---|
| SERVICE BRAKES, HYDRAULIC | 1 |
| AIR BAGS | 1 |
| LATCHES/LOCKS/LINKAGES | 1 |
Recent Complaints
20120521LATCHES/LOCKS/LINKAGES
THERE ARE NO CHILD SAFETY LOCKS ON THE REAR DOORS. THE MANUFACTURER SEEMS TO THINK THE FACT THAT THE DOOR LOCKS ONCE THE CAR IS MOVING OVER A SPECIFIC SPEED IS GOOD ENOUGH, THE PROBLEM IS A CHILD CAN STILL PULL THE HANDLE TWICE TO OPEN THE DOOR WHILE IT'S MOVING, OR SIMPLY LIFT THE REAR LOCK LATCH AND PULL THE DOOR HANDLE ONCE, AND OUT THEY KID GOES AT HIGHWAY SPEEDS. I PERSONALLY DON'T UNDERSTAND HOW THE MANUFACTURER COULD GET AWAY WITH SELLING THIS CAR WITHOUT THIS MOST BASIC SAFETY FEATURE FOR CHILDREN'S PROTECTION. EITHER WE WAIT UNTIL SOME KIDS FLY OUT THIS CAR BEFORE ACTING, OR FORCE THE MANUFACTURER TO COME UP WITH A SOLUTION TO THIS SAFETY HAZARD. *TT
20100816CrashSERVICE BRAKES, HYDRAULIC
TL* THE CONTACT OWNS A 2009 MERCEDES BENZ S CLASS. THE CONTACT WAS DRIVING 55 MPH WHEN A VEHICLE AHEAD OF HIM ABRUPTLY STOPPED. THE CONTACT APPLIED THE BRAKES AS THE PEDAL WAS APPLIED DOWN TO THE FLOORBOARD AND REMAINED. THE CONTACT WAS UNABLE TO RELEASE THE BRAKE PEDAL AND CRASHED INTO THE PRECEDING VEHICLE. THE FRONTAL AIR BAGS DID NOT DEPLOY AND THE SOS SYSTEM DID NOT ENGAGE. THERE WERE NO REPORTED INJURIES. A POLICE REPORT WAS AVAILABLE (SP1L15000802). THE VEHICLE WAS TOWED TO A LOCAL REPAIR FACILITY. THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE AND THE CURRENT MILEAGES WERE 8,000.
Mileage: 8,000
20100816CrashAIR BAGS
TL* THE CONTACT OWNS A 2009 MERCEDES BENZ S CLASS. THE CONTACT WAS DRIVING 55 MPH WHEN A VEHICLE AHEAD OF HIM ABRUPTLY STOPPED. THE CONTACT APPLIED THE BRAKES AS THE PEDAL WAS APPLIED DOWN TO THE FLOORBOARD AND REMAINED. THE CONTACT WAS UNABLE TO RELEASE THE BRAKE PEDAL AND CRASHED INTO THE PRECEDING VEHICLE. THE FRONTAL AIR BAGS DID NOT DEPLOY AND THE SOS SYSTEM DID NOT ENGAGE. THERE WERE NO REPORTED INJURIES. A POLICE REPORT WAS AVAILABLE (SP1L15000802). THE VEHICLE WAS TOWED TO A LOCAL REPAIR FACILITY. THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE AND THE CURRENT MILEAGES WERE 8,000.
Mileage: 8,000
Compare 2009MERCEDES-BENZS CLASS to Similar Vehicles
NHTSA Investigations
Frequently Asked Questions
How many complaints does the 2009 MERCEDES-BENZ S CLASS have?▼
The 2009 MERCEDES-BENZ S CLASS has 3 NHTSA complaints, 2 crashes, 0 fires, 0 injuries, and 0 deaths reported.
What are the most common problems with the 2009 MERCEDES-BENZ S CLASS?▼
The most-complained component for the 2009 MERCEDES-BENZ S CLASS is SERVICE BRAKES, HYDRAULIC with 1 complaints. Other frequently reported areas include AIR BAGS and LATCHES/LOCKS/LINKAGES.
Is the 2009 MERCEDES-BENZ S CLASS safe to buy?▼
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?▼
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.
Vehicle Safety Guides
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.