There are 4 owner-reported air bags & restraints complaints for the 2004 Mercedes-Benz S-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
SRS SYSTEM NOT OPERATING ON PASSENGER SIDE. *TR
I HAVE A 2004 MERCEDES-BENZ AND THE SEAT BELT LOOK NEW BUT WILL NOT RETRACT. I AM THE SECOND OWNER OF THE CAR. I CALLED THE COMPANY IN USA AND THEY WILL NOT REPLACE THE SEAT BELT ASSEMBLY FREE OF CHARGE BECAUSE OF THE AGE OF THE CAR. MY BELIEF THAT THE SEAT BELT IS A SAFETY COMPONENTS AND THE COMPANY SHOULD REPLACE IT FREE OF CHARGE SINCE IT IS THE LAW IN MASSACHUSEETS TO WEAR A SEAT BELT. BUT I COULD NOT WEAR BECAUSE THE BELT IS STUCK. I SPENT $1141.62 TO REPLACE THE DRIVERS FRONT SEAT BELT ASSEMBLY ON NOVEMBER 07 2013. PLEASE LET ME KNOW IS THERE ANY SAFETY RECALL ON THIS CAR REGARDING THE SEAT BELT RETRACT ISSUES. THANK YOU FOR YOUR ATTENTION ON THIS ISSUES AND MAKE SURE THE BENZ MANUFACTURE MAKING THE SEAT BELT MECHANISM WORKING FOR LIFE TIME OR REPLACE IT FREE OF CHARGE FOR CONSUMERS. *TR
I HAVE HAD TO REPLACE TWO CABLE HARNESSES FOR SEAT BELT IN BOTH FRONT SEAT. CONNECTORS ARE BEING REPLACED IN EVERY S CLASS DUE TO MORE THAN FREQUENT FAILURE. MECHANIC HAS INFORMED ME THAT THESE CONNECTORS BY NOT OPERATING WILL CAUSE SAFETY RESTRAINT AND AIRBAGS TO NOT DEPLOY IN ACCIDENT. CONSEQUENTLY HAD TO REPLACE RIGHT FRONT PASSENGER CHILD RESTRAINT SENSOR IN A 2004 S500 MERCEDES 4MATIC DUE TO FAILURE ALSO. BOTH ITEMS AS DESCRIBED ARE CONSTANTLY BEING REPLACED IN S-CLASS VEHICLES DUE TO FAILURE. LUCKILY I DID NOT HAVE AN ACCIDENT TO FIND OUT THE AIRBAG SYSTEM WOULD NOT ACTIVATE IN A CRASH. *TR
CONSUMER'S VEHICLE WAS REAR ENDED BY ANOTHER VEHICLE WHILE DRIVING AT 50 MPH WHILE STOPPING AT A TRAFFIC LIGHT. UPON IMPACT, NONE OF THE FRONTAL AIR BAG DEPLOYED. DRIVER SUSTAINED A SPRAINED HIP, AND A SWOLLEN KNEE. THE INSURANCE ADJUSTER INDICATED THAT THE FRONT SENSOR WASN'T HIT UPON IMPACT AND THAT WAS THE REASON WHY THE AIR BAG DIDN'T DEPLOY. VEHICLE WAS TOTALED.*AK
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026