ML350 3.5 V6 (M276)
2011–2015 · petrol · 3498cc · 306hp
Engine codes: M276
Reliability, common problems and owner reviews for the Mercedes Benz M-Class (ML) ML350 3.5 V6 (M276). Check this before you buy used.
The M276 3.5 V6 replaced the balance-shaft-troubled M272 with a cleaner direct-injection design — smoother and without the early M272's idler-gear flaw. It's strong but thirsty in the ML, chain-driven and generally robust; watch direct-injection intake carbon over time, the usual coil/ignition items, and keep the cooling healthy. A documented example is a dependable petrol — just expect big fuel bills versus the diesel.
Same engine, other cars
This is the same physical engine (M272) sold under different names across brands. Reliability is broadly shared — cross-check these:
Known Issues
Direct injection → intake-valve carbon over time.
Fix / Workaround: Walnut-blast intake if rough.
Repair cost: €300–€700
Typically appears after: 140,000 km
Coils/plugs and cooling parts with age.
Fix / Workaround: Replace as needed.
Repair cost: €150–€600
Mileage Thresholds
After 200,000 km: Durable; carbon the main watch.
Pre-Purchase Checklist
- ☐No M272 balance-shaft flaw — better petrol
- ☐DI carbon if rough
- ☐Thirsty vs diesel
Frequently asked questions
Is the Mercedes Benz M-Class (ML) ML350 3.5 V6 (M276) reliable?
Maint. Sensitive — The M276 3.5 V6 replaced the balance-shaft-troubled M272 with a cleaner direct-injection design — smoother and without the early M272's idler-gear flaw. It's strong but thirsty in the ML, chain-driven and generally robust; watch direct-injection intake carbon over time, the usual coil/ignition items, and keep the cooling healthy. A documented example is a dependable petrol — just expect big fuel bills versus the diesel.
What are the common problems and reviews for the Mercedes Benz M-Class (ML) ML350 3.5 V6 (M276)?
The most commonly reported problems: Intake carbon (DI), Ignition / cooling (age).
Is a used Mercedes Benz M-Class (ML) ML350 3.5 V6 (M276) worth buying?
Fine if serviced correctly — but it punishes neglect hard. History and the right consumables matter.