MERCEDES-BENZ S400 · model year

2010 MERCEDES-BENZ S400

25 NHTSA complaints for this specific cohort.

NHTSA overall rating

Not crash-tested

New Car Assessment Program

The 2010MERCEDES-BENZS400 carries 25 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 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 2010 S400 is electrical system with 10 filings, followed by engine (3) and fuel/propulsion system (3). 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 15 investigation files overlapping the 2010 S400. 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.

25
Complaints
0
Crashes
0
Fires
0
Injuries
0
Deaths

Total Complaints

25 filings

Crashes Reported

0 reports

Source

NHTSA ODI

Federal complaints database

Complaints vs. fleet median (215)

At or below the fleet median complaint volume.

Complaints by Component

ComponentCount
ELECTRICAL SYSTEM10
ENGINE3
FUEL/PROPULSION SYSTEM3
UNKNOWN OR OTHER2
ENGINE AND ENGINE COOLING1
EQUIPMENT:APPLIANCE:AIR CONDITIONER1
ELECTRONIC STABILITY CONTROL (ESC)1
POWER TRAIN1
SUSPENSION1
VEHICLE SPEED CONTROL1
STEERING1

Recent Complaints

20220830SUSPENSION

Airmatic Suspension sprung a leak and could not be driven safely due to the vehicle getting severely low where the tire and rim tucked into the wheel well. When the airmatic suspension fails the vehicle can get so low that it can scrape the roadway, hit bumps and damage parts under which can dislodge and cause an severe accident or pile up. Requesting a Nationwide Recall on all Mercedes-Benz vehicles equipped with Airmatic Suspension.

20220830VEHICLE SPEED CONTROL

Airmatic Suspension sprung a leak and could not be driven safely due to the vehicle getting severely low where the tire and rim tucked into the wheel well. When the airmatic suspension fails the vehicle can get so low that it can scrape the roadway, hit bumps and damage parts under which can dislodge and cause an severe accident or pile up. Requesting a Nationwide Recall on all Mercedes-Benz vehicles equipped with Airmatic Suspension.

20220830STEERING

Airmatic Suspension sprung a leak and could not be driven safely due to the vehicle getting severely low where the tire and rim tucked into the wheel well. When the airmatic suspension fails the vehicle can get so low that it can scrape the roadway, hit bumps and damage parts under which can dislodge and cause an severe accident or pile up. Requesting a Nationwide Recall on all Mercedes-Benz vehicles equipped with Airmatic Suspension.

20210103ELECTRICAL SYSTEM

POWER ELECTRONIC CONTROL UNIT MALFUNCTION. CAR WILL NOT CRANK/ NO START. CAR WAS STATIONARY-PARKED.

Mileage: 115,000

20210103ENGINE

POWER ELECTRONIC CONTROL UNIT MALFUNCTION. CAR WILL NOT CRANK/ NO START. CAR WAS STATIONARY-PARKED.

Mileage: 115,000

20201118ELECTRICAL SYSTEM

THE COMPUTER CONTROL UNIT FOR THE HYBRID MOTOR HAS FAILED ON MY AND MANY S400S. THIS CAUSES CAR TO STALL OUT AT STOPLIGHTS OR WHILE DRIVING. THIS IS A SAFETY ISSUE.

Mileage: 100,009

20201005FUEL/PROPULSION SYSTEM

STRONG GAS ORDERS FROM INTERIOR AFTER FILL UP. STATIONARY, IN MOTION, STOPPED. TO THE POINT OF NAUSEA AND LIGHT HEADEDNESS. 2011 IS ON RECALL LIST FOR GAS PUMP AND SENDER REPLACEMENT, PLUS WARRANTY EXTENSION TO 15 YEARS FOR THIS PROBLEM. THIS NEEDS TO ALSO INCLUDE THE 2010 S400 HYBRIDS VEHICLE HAS ONLY 87,000 MILES ON IT, AND CANNOT BE DRIVEN DUE TO POSSIBLE FUEL INGITION AND THE POSSIBILITY OF A CATASTROPHIC FIRE. PLEASE RESPOND WITH THE UTMOST OF HASTE, LIVES ARE AT STAKE. DEATH BY FIRE IS HORRIFIC.

Mileage: 87,000

20200902ELECTRICAL SYSTEM

THE CAR FIRST STARTED TO STOP INTERMITTENTLY WITHOUT ANY WARNING AT ALL AT THE TRAFFIC INTERSECTION, THEN I WAS ABLE TO START IT AGAIN AFTER SHUTTING EVERY THING DOWN. THEN A MONTH LATER, THE SAME THING HAPPENED AGAIN BUT THIS TIME I WAS NOT ABLE TO START THE CAR AGAIN. THIS COULD BE A VERY DANGEROUS SAFETY SITUATION IF THE ENGINE SHUTS DOWN WHILE I WAS DRIVING ON THE FREEWAY. MERCEDES ONLY PROVIDED TEMPORARY SOLUTION BY REPLACING THE CAR HYBRID INVERTER POWER ELECTRONIC CONTROL UNIT THROUGH A CAMPAIGN BULLETIN 2012080004. THIS BULLETIN APPLIES TO MERCEDES S400, 2010-2012 YEAR MODEL. HOWEVER, THE MAIN PROBLEM STILL REMAINS AND POSES A VERY SERIOUS SAFETY ISSUE FOR ALL THE DRIVER AND PASSENGERS. THIS IS NOT AN ISOLATE PROBLEM. ITS A VERY KNOWN PROBLEM FOR LOTS OF OWNERS FOR THOSE MODEL YEARS. MY CONTACT EMAIL ADDRESS IS "[XXX]" SHOULD YOU NEED TO CONTACT ME. PLEASE SEE THE ATTACHMENT FOR THE INVERTER. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C.

Mileage: 109,000

20200204ELECTRICAL SYSTEM

FIRST THERE WAS NO POWER TO THE CAR SO WE REPLACED THE BATTERY. THEN THE CAR WAS RUNNING AND SHUT OFF ONE DAY AND WOULD NOT RESTART. THE VEHICLE WAS STATIONARY WHEN IT WOULD NOT RESTART. WE HAD IT TOWED TO MERCEDES DEALER. THEY ARE STATING IT THE POWER ELECTRONICS MODULE. THERE ARE TWO RECALLS RELATED TO THIS PART BUT WHEN CHECKING THE VIN OURS IS NOT PART OF THEM. THAT IS IMPOSSIBLE. THE MERCEDES DEALER EVEN STATED THERE WERE ISSUES WITH THIS PART THAT'S WHY MERCEDES ONLY MADE THESE CARS FOR TWO YEARS. PLEASE SEE CAMPAIGN NO. 2012080004. *TR

20191206POWER TRAIN

WHEN COMING TO A COMPLETE STOP, THE HYBRID SYSTEM SHUTS DOWN THE ENGINE AND FAILS TO RESTART. THIS PLACES THE DRIVER, PASSENGER AND OTHERS AT RISK OF COLLISION AS VEHICLE WILL REMAIN STOPPED IN TRAFFIC. THIS ISSUE HAS BEEN KNOWN TO MERCEDES-BENZ AS IF IS A FAILURE OF THE POWER ELECTRONICS MODULE. IT HAS BEEN SUBJECT TO TWO SERVICE CAMPAIGNS: 2012880004 NOVEMBER 2012 2015030006 JUNE 2015 HOWEVER IT APPEARS THAT THE DEFECTIVE PART IS REPLACED WITH A SIMILARLY DEFECTIVE PART. FURTHERMORE MERCEDES-BENZ NO LONGER MAKES THIS PART AVAILABLE FOR THIS MODEL WHICH WAS PRODUCED THROUGH 2013. THIS DEFECTIVE PART THIS MODEL AT HIGH RISK FOR THE SAFETY OF ITS OWNERS, PASSENGERS AND OCCUPANTS OF OTHER VEHICLES AS THE VEHICLE IS STOPPED IN THE ROAD. THIS IS A KNOWN ISSUE WITH THIS VEHICLE AND HAS BEEN EXPERIENCED BY MANY. OF NOTE THERE WERE FEW OF THIS VEHICLE MADE (S400 IS AN EARLY HYBRID MODEL MADE BY MERCEDES-BENZ) SUCH THAT A LOW NUMBER OF REPORTS REPRESENTS A HIGH PERCENTAGE O

Mileage: 70,000

20191203ELECTRICAL SYSTEM

2010 S400 HYBRID WONT START FIRST INSTANCE WAS LESS THAN 24 HOUR OF PURCHASING CAR FROM LOCAL DEALER. LIGHTS ALL ON BUT NO CRANK. STARTED AFTER AND TWO WEEKS LATER IT HAD TO BE TOWED BECAUSE IT COMPLETELY WONT START. MBUSA FORUM CHAT AND SEVERAL SOCIAL MEDIA GROUPS ALL AROUND THE WORLD HAS THE SAME PROBLEM WITH THIS MODEL AND IT COMES DOWN TO AN ELECTRONICS POWER MODULE THAT COST MORE THAN WHAT THE CAR IS WORTH TO REPAIR. PLEASE ADVISE!

Mileage: 47,426

20191203UNKNOWN OR OTHER

2010 S400 HYBRID WONT START FIRST INSTANCE WAS LESS THAN 24 HOUR OF PURCHASING CAR FROM LOCAL DEALER. LIGHTS ALL ON BUT NO CRANK. STARTED AFTER AND TWO WEEKS LATER IT HAD TO BE TOWED BECAUSE IT COMPLETELY WONT START. MBUSA FORUM CHAT AND SEVERAL SOCIAL MEDIA GROUPS ALL AROUND THE WORLD HAS THE SAME PROBLEM WITH THIS MODEL AND IT COMES DOWN TO AN ELECTRONICS POWER MODULE THAT COST MORE THAN WHAT THE CAR IS WORTH TO REPAIR. PLEASE ADVISE!

Mileage: 47,426

20190108ELECTRICAL SYSTEM

I HAVE A 2010 MERCEDES S400 THAT WAS PURCHASED NEW IN NYC AND I WAS PROMISED A 10YR/150K MILE WARRANTY BECAUSE OF A CARB ADOPTION NY AND 10 OTHER STATES WERE INVOLVED IN. MY VEHICLE HAS ONLY 37K MILES AND IS NEVER BEEN CRASHED OR PAINTED. I WENT TO MERCEDES OF MANHATTAN LOCATED ON 770 11TH AVE NYC, NY 10019. MY VEHICLE WAS DENIED THIS WARRANTY COVERAGE THE SERVICE MANAGER STATED BECAUSE IT'S AT HIS DISCRETION TO GRANT THIS OR NOT. I THEN PLEADED WITH HIM AND HE BEGAN TO INSULT ME SAYING MY VEHICLE IS FAR FROM PERFECT AND HE CAN'T GRANT AN ASSISTANCE. I MADE HIM AWARE OF MY WARRANTY INFORMATION I HAD AND HE SAID THERE IS NO NEED BECAUSE HE SEES EVERYTHING I HAVE ON HIS COMPUTER AND MERCEDES'BENZ DOESN'T MAKE MISTAKES. I THEN ASKED FOR A SPECIFIC REASON WHY I'M BEING DENIED AND HE THEN TOLD ME MY VEHICLE WASN'T UP TO DATE ON MAINTENANCE. I SHOWED HIM THE SERVICE RECORDS THAT SHOWED THE VEHICLE WAS UP TO DATE WITH MAINTENANCE AND HIS DEALER EVEN REPORTED IT ON CARFAX. HE THEN SAID HE WILL

Mileage: 37,000

20160729ELECTRICAL SYSTEM

THE S400 HYBRID HAS A HABIT OF STALLING WHEN IN A STOP POSITION. THIS REQUIRES A COMPLETE RE-START AT A STOP LIGHT OR AFTER HAVING COME TO A COMPLETE STOP. IN ADDITION THE AIR CONDITIONING SHUTS OFF AND DOES NOT COME BACK ON UNTIL YOU STOP FOR A FEW MINUTES AND RE-START THE VEHICLE. THE CAR STALLING IS VERY UN-SAFE. THE CAR STALLS AT A STOP POSITION.

Mileage: 61,000

20160729ENGINE

THE S400 HYBRID HAS A HABIT OF STALLING WHEN IN A STOP POSITION. THIS REQUIRES A COMPLETE RE-START AT A STOP LIGHT OR AFTER HAVING COME TO A COMPLETE STOP. IN ADDITION THE AIR CONDITIONING SHUTS OFF AND DOES NOT COME BACK ON UNTIL YOU STOP FOR A FEW MINUTES AND RE-START THE VEHICLE. THE CAR STALLING IS VERY UN-SAFE. THE CAR STALLS AT A STOP POSITION.

Mileage: 61,000

20160603FUEL/PROPULSION SYSTEM

CAR STALLS CONSTANTLY, LOOSE FUEL CAP WARNING COMES ON, CHECK ENGINE LIGHT COMES ON. I HAVE REPLACED THE FUEL CAP, CHECKED VEHICLE CODES, BUT CANNOT GET THE ISSUE IDENTIFIED. A VEHICLE STALLING LIKE THIS IS A TREMENDOUS SAFETY HAZARD, AND IT MAY BE POSSIBLE THAT THERE IS AN ISSUE WITH THE FUEL DELIVERY SYSTEM IN THIS YEAR MODEL, JUST AS THERE WAS WITH THE 2011-2012 MODELS WHICH RESULTED IN A RECALL. THIS HAPPENS BOTH WHEN THE VEHICLE IS STATIONARY AND IN MOTION.

Mileage: 69,000

20151023ELECTRICAL SYSTEM

VEHICLE BEGAN TO CUT COMPLETELY OFF WHEN STOPPED AT A RED LIGHT OR STOP SIGN. IT BEGAN TO TAKE LONGER AND LONGER TO RESTART WHEN TURNED OFF AND ON. EVENTUALLY THE VEHICLE WOULD NOT START AT ALL. WHEN TAKEN TO THE DEALER, I WAS INFORMED THAT THE POWER CONTROL MODULE WAS BAD AND THE COST TO REPLACE WAS UPWARD OF $11,000. AFTER SPEAKING TO MANY MANAGERS AND MY CAR SITTING AT THE DEALERSHIP FOR NEARLY 30 DAYS, I WAS CALLED AND INFORMED THAT THERE WAS A MANUFACTURER'S DEFECT FOUND IN THE POWER CONTROL MODULES WHICH WAS JUST EXTENDED TO COVER THE 2010 MODEL AND THAT THE MANUFACTURER WAS COVERING THE REPLACEMENT COSTS.

20150817UNKNOWN OR OTHER

I WAS DRIVING, TRYING TO GET OFF THE HIGHWAY, I TOOK EXIT WHICH IS A 270 DEGREE CIRCLE WITH SHARP TURNS, I AM NOT DRIVING FAST AT ALL BUT THE CAR JUST STALLED WHILE DRIVING, STEERING WHEEL LOCKED AND I ALMOST FALL DOWN THE HILL, I ALMOST DIED, THIS PRODUCT HAS SERIOUS QUALITY ISSUES. I WAS DRIVING IN DOWN TOWN MANHATTAN WITH TWO OF MY MOST IMPORTANT CLIENTS, WE WERE GOING TO AN ART AUCTION, THE CAR JUST STALLED WHEN I STOPPED AT RED LIGHT AND WILL NOT RESTART, ME AND MY CLIENTS WERE WEARING 3 PIECE SUITS AND ITS MORE THAN 90 DEGREES OUT, WE WERE SWEATING LIKE CRAZY, I BELIEVE THE CAR'S POOR QUALITY MADE IT TO FAIL WITHOUT ANY SIGNS.

Mileage: 101,000

20150817ELECTRONIC STABILITY CONTROL (ESC)

I WAS DRIVING, TRYING TO GET OFF THE HIGHWAY, I TOOK EXIT WHICH IS A 270 DEGREE CIRCLE WITH SHARP TURNS, I AM NOT DRIVING FAST AT ALL BUT THE CAR JUST STALLED WHILE DRIVING, STEERING WHEEL LOCKED AND I ALMOST FALL DOWN THE HILL, I ALMOST DIED, THIS PRODUCT HAS SERIOUS QUALITY ISSUES. I WAS DRIVING IN DOWN TOWN MANHATTAN WITH TWO OF MY MOST IMPORTANT CLIENTS, WE WERE GOING TO AN ART AUCTION, THE CAR JUST STALLED WHEN I STOPPED AT RED LIGHT AND WILL NOT RESTART, ME AND MY CLIENTS WERE WEARING 3 PIECE SUITS AND ITS MORE THAN 90 DEGREES OUT, WE WERE SWEATING LIKE CRAZY, I BELIEVE THE CAR'S POOR QUALITY MADE IT TO FAIL WITHOUT ANY SIGNS.

Mileage: 101,000

20150817ELECTRICAL SYSTEM

I WAS DRIVING, TRYING TO GET OFF THE HIGHWAY, I TOOK EXIT WHICH IS A 270 DEGREE CIRCLE WITH SHARP TURNS, I AM NOT DRIVING FAST AT ALL BUT THE CAR JUST STALLED WHILE DRIVING, STEERING WHEEL LOCKED AND I ALMOST FALL DOWN THE HILL, I ALMOST DIED, THIS PRODUCT HAS SERIOUS QUALITY ISSUES. I WAS DRIVING IN DOWN TOWN MANHATTAN WITH TWO OF MY MOST IMPORTANT CLIENTS, WE WERE GOING TO AN ART AUCTION, THE CAR JUST STALLED WHEN I STOPPED AT RED LIGHT AND WILL NOT RESTART, ME AND MY CLIENTS WERE WEARING 3 PIECE SUITS AND ITS MORE THAN 90 DEGREES OUT, WE WERE SWEATING LIKE CRAZY, I BELIEVE THE CAR'S POOR QUALITY MADE IT TO FAIL WITHOUT ANY SIGNS.

Mileage: 101,000

Compare 2010MERCEDES-BENZS400 to Similar Vehicles

NHTSA Investigations

View all investigations

Frequently Asked Questions

How many complaints does the 2010 MERCEDES-BENZ S400 have?
The 2010 MERCEDES-BENZ S400 has 25 NHTSA complaints, 0 crashes, 0 fires, 0 injuries, and 0 deaths reported.
What are the most common problems with the 2010 MERCEDES-BENZ S400?
The most-complained component for the 2010 MERCEDES-BENZ S400 is ELECTRICAL SYSTEM with 10 complaints. Other frequently reported areas include ENGINE and FUEL/PROPULSION SYSTEM.
Is the 2010 MERCEDES-BENZ S400 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.