Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
Limited mileage data: 15 of 19 reports include usable mileage. There isn’t enough coverage to show a useful chart.
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
Electrical System. Review the 4 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Tires. Review the 4 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Engine. Review the 2 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
1 crash reports0 fire reports1 injury reports
What owners actually said
19 reports
70,000 miles · Jun 26, 2015
Suspension
TL* THE CONTACT OWNS A 2008 MERCEDES BENZ S550. THE CONTACT STATED THAT THE FRONT END OF THE VEHICLE LOWERED, INDICATING THAT THERE WAS SUSPENSION FAILURE. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 70,000. UPDATED 09/01/15*LJ UPDATED 12/7/2015*J…
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TL* THE CONTACT OWNS A 2008 MERCEDES BENZ S550. THE CONTACT STATED THAT THE FRONT END OF THE VEHICLE LOWERED, INDICATING THAT THERE WAS SUSPENSION FAILURE. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 70,000. UPDATED 09/01/15*LJ UPDATED 12/7/2015*JS
NHTSA ODI #10730608
87,609 miles · Apr 13, 2015
Tires
I PURCHASED 4 NEW 255/45/ZR18 EXTREMECONTACT DWS ABOUT 13 MONTHS AGO AND NOW ALL 4 TIRES HAVE A BULGING BUBBLE ON THE SIDEWALLS. OF COURSE I BROUGHT IT BACK FROM WHERE I PURCHASED IT FROM AND THEY BLAME IT ON POT HOLES, ROAD HAZARDS. I CURRENTLY CANNOT DRIVE THE VEHICLE IN FEAR THAT I MIGHT HAVE A BLOW OUT. I HAVE PURCHASED MANY…
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I PURCHASED 4 NEW 255/45/ZR18 EXTREMECONTACT DWS ABOUT 13 MONTHS AGO AND NOW ALL 4 TIRES HAVE A BULGING BUBBLE ON THE SIDEWALLS. OF COURSE I BROUGHT IT BACK FROM WHERE I PURCHASED IT FROM AND THEY BLAME IT ON POT HOLES, ROAD HAZARDS. I CURRENTLY CANNOT DRIVE THE VEHICLE IN FEAR THAT I MIGHT HAVE A BLOW OUT. I HAVE PURCHASED MANY TIRES BEFORE THAT WERE NOT CONTINENTAL AND NEVER EXPERIENCED WHAT IM GOING THROUGH NOW. LET SEE HOW LONG IT WILL TAKE TO BE CONTACTED WITH SOME HELP OR WHAT EXCUSE THEY GOING TO COME UP WITH. *TR
NHTSA ODI #10705489
Mileage unknown · Mar 22, 2014
Tires
MICHELIN PILOT SPORT A/S PLUS 255/45ZR18 99Y AS+ INSTALLED ON 2008 MERCEDES S550. TIRES TREAD IS "CHUNKING" WITH 18,000 MILES OF USE. PURCHASED FROM COSTCO. I HAVE CONTACTED COSTCO. WAS TOLD IT WAS "NORMAL", COMPLAINED IT CANNOT BE, WE NEGOTIATED BACK AND FORTH ON AN ADJUSTMENT. IT WASN'T SATISFACTORY. I WAS OFFERED FOR A DISCOU…
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MICHELIN PILOT SPORT A/S PLUS 255/45ZR18 99Y AS+ INSTALLED ON 2008 MERCEDES S550. TIRES TREAD IS "CHUNKING" WITH 18,000 MILES OF USE. PURCHASED FROM COSTCO. I HAVE CONTACTED COSTCO. WAS TOLD IT WAS "NORMAL", COMPLAINED IT CANNOT BE, WE NEGOTIATED BACK AND FORTH ON AN ADJUSTMENT. IT WASN'T SATISFACTORY. I WAS OFFERED FOR A DISCOUNT PRICE THE "NEW" VERSION OF THE TIRE, I.E. PILOT SPORT A/S 3. I HAVE READ THE OTHER COMPLAINTS ON NHTSA SITE. THEY ARE SIMILAR TO MINE. I SPOKE TO 4 DIFFERENT COSTCO EMPLOYEES, THREE DIFFERENT MICHELIN YET, I COULD NOT FINE ANYONE AT COSTCO OR MICHELIN THAT CAN ASSURE ME WITH AN OFFICIAL MICHELIN STATEMENT THE PROBLEM HAS BEEN CORRECTED WITH THE NEW PILOT SPORT 3. I WILL NOT PAY TO HAVE NEW TIRES INSTALLED AT A DISCOUNT AND HAVE THE SAME THING HAPPEN AGAIN.THESE TIRES ARE A POTENTIAL SAFETY HAZARD. *TR
NHTSA ODI #10574210
59,300 miles · Aug 27, 2013
Tires
THE TIRE TREAD ON THE MICHELIN PILOT SPORT A/S PLUS SHREDS OR CRUMBLES. MICHELIN CALLS IT "CHUNKING" AND SAID IT WAS DUE TO THE COMPOUND USED TO MAKE THE TIRE. THE COMPOUND HAS SINCE BEEN MODIFIED. THIS PROBLEM OCCURRED ON MY GIRL FRIEND'S 2009 MERCEDES C-SERIES SEDAN AND ALL FOUR TIRES WERE REPLACED IN OR ABOUT NOVEMBER 2012…
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THE TIRE TREAD ON THE MICHELIN PILOT SPORT A/S PLUS SHREDS OR CRUMBLES. MICHELIN CALLS IT "CHUNKING" AND SAID IT WAS DUE TO THE COMPOUND USED TO MAKE THE TIRE. THE COMPOUND HAS SINCE BEEN MODIFIED. THIS PROBLEM OCCURRED ON MY GIRL FRIEND'S 2009 MERCEDES C-SERIES SEDAN AND ALL FOUR TIRES WERE REPLACED IN OR ABOUT NOVEMBER 2012. I NOTICED THE SAME PROBLEM OCCURRING TO THE FRONT TIRES ON MY MERCEDES S550 AT JUST OVER 24,000 MILES OF USE. THE TIRE HAS A 45,000 TREAD-WEAR WARRANTY. THE TIRES WERE PURCHASED IN NOVEMBER 2010. THE MICHELIN DEALER AND MICHELIN ACKNOWLEDGE THIS IS A KNOWN PROBLEM. THE TREAD SPLITS OR CRACKS AT THE SIPES AND FALLS OFF, AFFECTING TRACTION AND POSSIBLY RISKING A CATASTROPHIC FAILURE. MICHELIN SAID THE PROBLEM OCCURS ON ONLY CERTAIN MODEL VEHICLES AND DOES NOT INTEND A RECALL. THESE TIRES WERE RECOMMENDED BY MICHELIN FOR MY VEHICLE, BUT IT APPEARS THEY MAY NO LONGER RECOMMEND IT. THEY NO LONGER RECOMMEND OR MAKE THEM FOR MY GIRL FRIEND'S VEHICLE. *TR
NHTSA ODI #10537491
57,000 miles · Aug 23, 2013
Electrical SystemEquipment Adaptive/mobility
I WAS IN UNFAMILIAR AREA. REMOTE KEY WOULD NOT OPERATE. WHEN USING SMALL KEY TO ENTER VEHICLE CAR SIREN WOULD NOT QUIT BLARING AND .NEW BATTERIES DID NOT HELP. MERCEDES RESPONDER TOLD ME I HAD INOPERATIVE "DEAD" KEY. CAR OF COURSE WAS INOPERATIVE. NO WAY TO MOVE CAR FROM AREA. COULD NOT SECURE CAR. I HAD RBM IN ATLANTA ON CELL…
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I WAS IN UNFAMILIAR AREA. REMOTE KEY WOULD NOT OPERATE. WHEN USING SMALL KEY TO ENTER VEHICLE CAR SIREN WOULD NOT QUIT BLARING AND .NEW BATTERIES DID NOT HELP. MERCEDES RESPONDER TOLD ME I HAD INOPERATIVE "DEAD" KEY. CAR OF COURSE WAS INOPERATIVE. NO WAY TO MOVE CAR FROM AREA. COULD NOT SECURE CAR. I HAD RBM IN ATLANTA ON CELL PHONE ENTIRE TIME. ABOUT HOUR LATER SOMEONE TOOK ME TO MY HOME FOR SPARE KEY. THIS WORKED. KEY WAS AS MERCEDES RESPONDER TOLD ME...... DEAD. THE MERCEDES KEYS ARE UNSAFE AND UNDEPENDABLE. NEED TO BE RECALLED. MERCEDES WOULD NOT REPLACE "DEAD" KEY PER KYRUS FRAMES AT RBM IN ATLANTA. BECAUSE MY CAR HAD 57000 MILES ON IT AND OUT OF WARRANTY. KEY MUST BE RECALLED DUE TO SAFETY CONCERN THERE IS NO WAY TO OPERATE A "DEAD" KEY. MERCEDES RESPONDER TOLD ME THAT HE SEES IT ALL THE TIME. WHAT IF??? I HAD BEEN MILES FROM HOME? UNSAFE AREA? COMPROMISING SITUATION?THIS IS UNACCEPTABLE FOR $100,000 CAR. I COULD BE DEAD. JUST PROVIDE A WORKABLE KEY MERCEDES. *TR
NHTSA ODI #10536999
101,300 miles · Mar 11, 2013
Power Train
MERCEDES BENZ, S550, 4MATIC, 2008. I WAS STOPPED AT A RED LIGHT. WHEN THE LIGHT TURNED GREEN AND I WAS MOVING FORWARD AT ABOUT 15-20 MILES PER HOUR, THE CAR CAME TO A SUDDEN STOP. THE VEHICLE BEHIND ME ALMOST RAN INTO MY BACK SINCE THERE WERE NO BRAKE LIGHTS ILLUMINATED WHEN THIS UNFORTUNATE MALFUNCTION TOOK PLACE. I IMMEDI…
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MERCEDES BENZ, S550, 4MATIC, 2008. I WAS STOPPED AT A RED LIGHT. WHEN THE LIGHT TURNED GREEN AND I WAS MOVING FORWARD AT ABOUT 15-20 MILES PER HOUR, THE CAR CAME TO A SUDDEN STOP. THE VEHICLE BEHIND ME ALMOST RAN INTO MY BACK SINCE THERE WERE NO BRAKE LIGHTS ILLUMINATED WHEN THIS UNFORTUNATE MALFUNCTION TOOK PLACE. I IMMEDIATELY LOOKED THE CONTROL PANEL FOR ANY MALFUNCTION ALARM AND THERE WERE NONE. THE ROOT CAUSE OF THE PROBLEM WAS FRONT DIFFERENTIAL SEIZE UP WITHOUT ANY WARNING. THERE WERE THE RIGHT AMOUNT OF OIL IN THE RESERVOIR SO THE PROBLEM WAS NO DUE TO LACK OF LUBRICATION. THE CAR WAS REPAIRED BY MB DEALER AND I WAS GIVEN A BILL FOR (HOLD ON TO YOUR PANTS) $8,252. I CALLED MB CUSTOMER SERVICE TO FIND OUT IF THERE ARE ANY RECALL ON THIS MALFUNCTION. I WAS TOLD NONE REPORTED. I HAVE A HARD TIME BELIEVING THAT I AM THE ONLY ONE WITH THIS PROBLEM. I ALMOST CAME TO A DECISION TO SIGN OVER THE TITLE AND HAVE THEM SELL THE CAR TO RECOVER THE REPAIR COST. OBVIOUSLY THE DEALER IS NOT AT FAULT HERE. HOWEVER YOU WOULD EXPECT THAT A CAR OF THIS CALIBER WOULD BE BETTER DESIGNED AND SUPPORTED. AS YOU HAVE GUESSED I AM UNHAPPY WITH MY MB. BY THE WAY IF YOU ARE TRYING TO SIGN ON FOR MB ONLINE OWNER COMMUNITY AND WANT TO CHOOSE THE USERNAME "UNHAPPY", YOU CAN'T. IT IS ALREADY TAKEN. TRY IT WITH SOME #S. *TR
NHTSA ODI #10502393
41,000 miles · Jun 26, 2011
Fuel System, Gasoline
CAR STALLED WHILE DRIVING ON 10 FWY GOING FROM AZ TO CALIF. WOULD NOT RESTART & WAS TOWED TO PALM SPRINGS MBZ. NOT OPEN TIL MON 27TH. *TR
NHTSA ODI #10408926
14,000 miles · Jul 2, 2009
Equipment
I GOT A BLOW OUT IN THE REAR LEFT SIDE TIRE. I WAS DOING ABOUT 40 MPH AND DID NOT GO OVER ANYTHING THAT I WAS AWARE OF. I WENT TO CHANGE THE TIRE USING THE SUPPLIED TIRE AND JACK. THE JACK WAS VERY FLIMSY AND AFTER I RAISED THE VEHICLE THE JACK FLIPPED OVER CAUSING DAMAGE TO MY CAR, HOWEVER I NARROWLY AVOIDED PERSONAL INJURY.…
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I GOT A BLOW OUT IN THE REAR LEFT SIDE TIRE. I WAS DOING ABOUT 40 MPH AND DID NOT GO OVER ANYTHING THAT I WAS AWARE OF. I WENT TO CHANGE THE TIRE USING THE SUPPLIED TIRE AND JACK. THE JACK WAS VERY FLIMSY AND AFTER I RAISED THE VEHICLE THE JACK FLIPPED OVER CAUSING DAMAGE TO MY CAR, HOWEVER I NARROWLY AVOIDED PERSONAL INJURY. THERE IS A PLATE UNDER THE VEHICLE AT THE JACK CONTACT POINT WHICH ALSO BROKE OFF THE VEHICLE WHEN THE JACK ROLLED OVER. THE FOLLOWING ARE THE DEFECTS I BELIEVE EXIST. 1. THE JACK IS EXTREMELY FLIMSY AND IS DIFFICULT TO SET PROPERLY ON THE GROUND. 2.THE JACK PLATE ON THE CAR APPARENTLY IS ALSO NOT VERY STABLE. 3. THE HANDLE ON THE JACK IS VERY SHORT AND REQUIRES AN EXTREME AMOUNT OF STRENGTH TO LIFT CAR. (NO LEVERAGE) 4. THE LUG WRENCH IS ALSO VERY SHORT AND REQUIRES A LOT OF STRENGTH TO LOOSEN BOLTS, THERE IS ABSOLUTELY NO LEVERAGE. I ESTIMATE THE DAMAGE TO MY VEHICLE, WHICH I BLAME ON THE DEFECTIVE JACK TO BE ABOUT $750.00. *TR
NHTSA ODI #10275658
Mileage unknown · Jan 21, 2009
Service Brakes, Hydraulic
I HAVE 2008 MERCEDES S550. THE CAR SUDDENLY STARTED MAKING NOISE IN THE FRONT AND I CALLED DEALERSHIP. THEY TOLD ME THE BRAKES ARE GONE AND EVEN ROTORS ARE DAMAGED. I HAD NO INDICATION ALL THIS TIME I WAS DRIVING THAT THE CAR HAD NO BRAKES AS NO BRAKELIGHTS CAME ON. TILL THE TIME I WENT TO DEALERSHIP NO INDICATION CAME AS SENSOR…
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I HAVE 2008 MERCEDES S550. THE CAR SUDDENLY STARTED MAKING NOISE IN THE FRONT AND I CALLED DEALERSHIP. THEY TOLD ME THE BRAKES ARE GONE AND EVEN ROTORS ARE DAMAGED. I HAD NO INDICATION ALL THIS TIME I WAS DRIVING THAT THE CAR HAD NO BRAKES AS NO BRAKELIGHTS CAME ON. TILL THE TIME I WENT TO DEALERSHIP NO INDICATION CAME AS SENSORS ARE NOT WORKING. IS IT NOT UNSAFE TO BE DRIVING ON THE HIGHWAY 60 TO 70 MILES /HR WITH NO BREAK SENSORS . I CALLED MERC AND THE TOP TWO PEOPLE ROBYN AND TIM IN ESCALATION DEPT TELL ME AT FIRST THEY ARE PICKING UP THE. REPAIR AND THEN TOTALLY TURNED THEIR BACKS AND YEARS AND SAID TO ME IT IS NOT A SAFETY ISSUE WHERE THE CARS BREAKS ARE COMPLETELY GONE TO THE POINT THE ROTORS ARE DAMAGED AND THERE IS MO INDICATION. WITH A 100K CAR WHICH HAS ALL THESE FANCY FEATURES BUT BRAKES ARE NOT IMO. *TR
NHTSA ODI #10255933
Official recalls
0
No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0
No exact-year investigations in this snapshot.
2008 Mercedes Benz S550 Problems, Complaints & Recalls | Skip That Year