IllustrationSYSTEMATIC WATER INTRUSION BY AIR COWL DISABLED ELECTRONICS WHILE DRIVING AND ALSO LONG TERM CAUSED A HEALTH ISSUE RESPIRATORY NEUROLOGICAL - TWO YEARS HOMEBOUND AFTER WAS FINALLY DIAGNOSED W/UNKNOWN CANCER
2004 Mercedes Benz S500
Owner reports · Recalls · Investigations
Limited comparison data
There is not enough comparable history to draw a useful model-year comparison.
About this comparison →How this year compares
Owner complaints by model year
Compare all S500 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
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When problems were reported
Mileage at the reported incident
Limited mileage data: 11 of 12 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 6 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 3 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Suspension. Review the 3 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 reports2 injury reports
Steering complaints
2 reportsDURING RAIN STORM, WATER SEEPEED INO AIR COWL INTO CABIN-PASSENGER SIDE- FLOODED FLOOR EVENTUALLY SAM ELECTRONIC MODULE UNDER FLOOR WAS DAMAGED AND SHUT OFF ELECTRONICS IN AUTOMOBILE WHILE DRIVING AT HIGH SPEED ON FREEWAY- WITH OUT POWER CONTROLS OPERATING IT MADE DRIVING AND STOPPING THE CAR A VERY DANGEROUS FEAT EVENTUALLY WEN…
Read full complaint
DURING RAIN STORM, WATER SEEPEED INO AIR COWL INTO CABIN-PASSENGER SIDE- FLOODED FLOOR EVENTUALLY SAM ELECTRONIC MODULE UNDER FLOOR WAS DAMAGED AND SHUT OFF ELECTRONICS IN AUTOMOBILE WHILE DRIVING AT HIGH SPEED ON FREEWAY- WITH OUT POWER CONTROLS OPERATING IT MADE DRIVING AND STOPPING THE CAR A VERY DANGEROUS FEAT EVENTUALLY WENT OFF ROAD INTO GUARDRAIL AND STOPPED. MERCEDES BENZ HAS BEEN AWARE (A LAWSUIT WAS FILED IN CA) OF DESIGN DEFECT OF AIR COWL DRAIN CLOGGING AND FLOODING CABIN BUT HAS KEPT THIS DANGEROUS FLAW FROM OWNERS EVEN THOUGH WE LEARNED THEY HAVE FOR SALE AN UPDATE KIT TO PREVENT THIS AT OWNERS EXPENSE. OUR CASE FORTUNATELY DID NOT CAUSE A FATALITY BUT IT COULD HAVE EASILY HAD IF THE VEHICLE WAS NOT BEING DRIVEN BY AN EXPERT DRIVER- LOOSING POWER CONTROLS ON A RAIN STORM/ WET ROAD WITH NO POWER ACCESORIES / BRAKES IS NOT A SAFE CONDITION WHICH NEEDS TO BE ADDRESSED ASAP FOLLOWING THIS MISHAP WE CONTACTED LOCAL MERCEDS DEALERSHIP IN PLANO,TX AUTOHAUS WHO RESPONDED BEING UNAWARE AND HAD NO HISTORY OF SUCH PROBLEM- APPARENTLY MERCEDES IS BEING WRONGFULLY SECRETIVE OF THIS SERIOUS FLAW NOT ONLY TO CONSUMERS BUT THEIR OWN PEOPLE 9
Official recalls
0No 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
0No exact-year investigations in this snapshot.