2003 Mercedes-Benz S430 vs 2003 Mercury Grand Marquis
Complaints, recalls, TSBs, investigations and safety ratings side by side, from official federal data. Last verified Aug 8, 2026. Raw complaint counts are not adjusted for sales volume.
| Metric | 2003 Mercedes-Benz S430 | 2003 Mercury Grand Marquis |
|---|---|---|
| NHTSA complaints | 26 | 362 |
| Recall campaigns | 0 | 1 |
| Service bulletins (TSBs) | 38 | 90 |
| Investigations | 0 | 6 |
| Crash reports | 0 | 22 |
| Fire reports | 1 | 2 |
| NCAP overall rating | — | — |
| EPA MPG (combined) | 18 | 18 |
| Median reported incident mileage | 93,835 mi | 87,000 mi |
Reported problems side by side
| Component | Mercedes-Benz S430 | Mercury Grand Marquis |
|---|---|---|
| Exterior Lighting | 3 | 207 |
| Electrical System | 12 | 51 |
| Suspension | 4 | 28 |
| Steering | 1 | 28 |
| Vehicle Speed Control | 1 | 27 |
| Power Train | 2 | 12 |
| Engine and Engine Cooling | 0 | 13 |
| Air Bags | 1 | 11 |
Symptoms owners describe
| Stalling | 0 | 15 |
| Rust / corrosion | 0 | 10 |
| Vibration / shaking | 0 | 5 |
2003 Mercedes-Benz S430
2003 Mercury Grand Marquis
Compare all Mercedes-Benz S430 vs Mercury Grand Marquis years →
Method. Complaints are unique NHTSA reports. A vehicle that sold more units will naturally accumulate more complaints — use shares and read the underlying reports before drawing conclusions.