2014 Mercedes-Benz ML350 — Should You Buy One?
Typical asking price: $13,000–$20,000. There are 2 high-severity known issues you need to know before handing over a check.
Kestrel Take
A solid, comfortable midsize luxury SUV with the durable M276 V6. Air suspension where fitted is the recurring cost, and the BlueTEC diesel version adds an emissions system that fails expensively. The gas V6 on steel springs is the version to want.
What we checked
Checked against public records, 2026-09-25
We checked NHTSA for this exact year and model and it returned nothing. That is a fact about the database, not a clean bill of health — it usually means few of these were sold or few owners filed. What follows is our own write-up, unreconciled.
Known Issues for the 2014 Mercedes-Benz ML350
Ranked by wallet impact. These are documented, recurring problems — not freak accidents. How we decide that.
Air struts leak and the compressor fails under the weight of an SUV. Corner sag overnight is the symptom.
Repair cost (estimate): $2,000-$4,500 — about 27% of what this car is typically worth
Source: not yet checked against public records.
On the ML350 BlueTEC, DEF injectors, NOx sensors, and the particulate filter all fail and produce countdown-to-no-start warnings.
Repair cost (estimate): $1,500-$5,000 — about 30% of what this car is typically worth
Source: not yet checked against public records.
The older M272 V6 had a balance shaft sprocket defect. The 2014 uses the M276, which avoids it — verify the engine code.
Repair cost (estimate): $4,000-$7,000 if the wrong engine — about 42% of what this car is typically worth
Source: not yet checked against public records.
Chain stretch and actuator failures causing binding and warnings.
Repair cost (estimate): $2,000-$4,000
Source: not yet checked against public records.
Walk-Away Red Flags
- ✗Vehicle sitting low or slow to rise
- ✗DEF or emissions countdown messages on a BlueTEC
- ✗Multiple warning lights
- ✗No Mercedes specialist in the history
Good Signs
- ✓Steel spring suspension
- ✓M276 gas V6 rather than the diesel
- ✓Full dealer or specialist service history with receipts
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