"How reliable is the 2010 Mercedes-Benz S400?"

"Based on 25 NHTSA complaints, the 2010 Mercedes-Benz S400 has a median complaint mileage of 65000 miles. The most common issue is ELECTRICAL SYSTEM."

"What are common problems with the 2010 Mercedes-Benz S400?"

"The most frequently reported component in NHTSA complaints for the 2010 Mercedes-Benz S400 is ELECTRICAL SYSTEM, accounting for a significant portion of the 25 total complaints filed."

2010 Mercedes-Benz S400: Reliability Data

Source: NHTSA — 25 complaints

Total Complaints

65,000mi

Median Mileage

ELECTRICAL SYSTEM

Top Issue

Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

42,000 25th Percentile

65,000 Median Mileage

101,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ELECTRICAL SYSTEM

FUEL/PROPULSION SYSTEM

ENGINE

UNKNOWN OR OTHER

ENGINE AND ENGINE COOLING

EQUIPMENT:APPLIANCE:AIR CONDITIONER

ELECTRONIC STABILITY CONTROL (ESC)

POWER TRAIN

SUSPENSION

VEHICLE SPEED CONTROL

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"PURCHASED A MERCEDES BENZ S400 HYBRID LAST YEAR WITH 20,000 MILES DRIVEN. THIS CAR RETAILS NEW FOR $119,000. THE CAR HAS NOW BEEN IN THE SHOP AT EWING MERCEDES BENZ OF PLANO SINCE MAY 2013 OVER 6 TIMES FOR THE SAME ENGINE LIGHT AND CODE. THEY ARE UNABLE TO REPAIR THE VEHICLE AFTER EXTENSIVE TESTING ..."

"FIRST TROUBLE: ENGINE DID NOT START ON 11/13/2010. THE TROUBLE HAPPENED WITHIN THE FIRST MONTH AFTER DELIVERY. TWO REPAIRMEN ON THE ROAD SERVICE SHOWED AND COULD NOT FIX THE PROBLEM. THIRD REPAIRMAN WHO SAID AS THE NUMBER-ONE REPAIRMAN ON THE ROAD SERVICE FINALLY FIXED THE PROBLEM, TAKING ABOUT 3 HO..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28