The 2.0 d (Mercedes OM654) engine was fitted to the Mercedes-Benz GLB (X247) (2019–now). In the EU that is 69.2 % of all new cars of this generation.
Versions: 2.0 150 hp, 2.0 190 hp, 2.0 116 hp.
The most expensive known risk is exhaust-side roller rocker arms wear (ticking, rough idle): it usually appears at 60,000–250,000 km and costs €1,500–3,000 to fix.
Engine faults ✓ Checked against sources (10/2026)
✓ The faults of this engine were checked against sources (10/2026). Each item has at least two independent sources or an official recall or parts-maker technical note.
AdBlue / SCR faults: NOx sensor, AdBlue pump or heater, dosing valve
usually 60,000–180,000 km · Medium risk
Signs: AdBlue or emissions warning with a countdown in km; if ignored, the engine will not restart; NOx sensor codes, sometimes limp mode
Fix: Read the codes at once; check for Mercedes SCR software updates, then test and replace the faulty NOx sensor, pump / heater or dosing valve
€300–1,200
DPF clogging from short trips
usually 60,000–200,000 km · Medium risk
Signs: DPF warning, frequent or interrupted regenerations, reduced power
Fix: Drive longer runs or run a forced regeneration; check the pressure sensor and EGR first; clean or replace the filter if ash-loaded; use MB 229.52 / 229.71 oil
€150–2,000
EGR valve and cooler sooting (low-pressure EGR on early engines)
usually 80,000–200,000 km · Medium risk
Signs: Rough idle, power loss, EGR fault codes (P0400 range), regenerations do not finish
Fix: Check EGR position and flow in live data; clean or replace the valve, and the cooler if it is blocked or leaking
€300–1,200
Exhaust-side roller rocker arms wear (ticking, rough idle)
usually 60,000–250,000 km · Medium risk
Signs: Dull ticking or plopping noise from the top of the engine, rough idle
Fix: Inspect rockers and cam lobes; replace all roller rockers and lash adjusters, and the camshaft housing if the cams are marked
€1,500–3,000
Gearboxes
Manual
Clutch wear
usually 120,000–200,000 km · Medium risk
Signs: Slipping, high bite point
Fix: Replace clutch kit
€500–900
Dual-mass flywheel
usually 150,000–220,000 km · Medium risk
Signs: Rattle at idle, vibration pulling away
Fix: Replace with clutch
€700–1,400
7G-DCT (A / B / CLA / GLA)
7G-DCT jerky low-speed shifts / mechatronic
usually 60,000–160,000 km · Medium risk
Signs: Jerks in traffic, delayed engagement
Fix: Software update; fluid change; mechatronic
€200–2,000
Service plan for this engine
Typical routine maintenance cost for 100,000 km: €2,450–5,900. Sum of the services and wear parts in the plan above (about 15,000 km a year, independent workshop), without faults.
Intervals and typical prices for the Mercedes-Benz GLB (X247) with the 2.0 d (Mercedes OM654) engine. The app gives the exact plan for your mileage.
Versions of this engine in the Mercedes-Benz GLB (X247)
Source: European Environment Agency (EEA), monitoring of CO₂ emissions from new passenger cars, CC BY 4.0. CO₂ and fuel use are official type-approval values (WLTP from 2021), not real-world consumption.
Common questions
What are the biggest risks of the Mercedes-Benz GLB (X247) with the 2.0 d (Mercedes OM654) engine?
The faults with the highest risk: exhaust-side roller rocker arms wear (ticking, rough idle) (60,000–250,000 km, €1,500–3,000); DPF clogging from short trips (60,000–200,000 km, €150–2,000); adBlue / SCR faults: NOx sensor, AdBlue pump or heater, dosing valve (60,000–180,000 km, €300–1,200); EGR valve and cooler sooting (low-pressure EGR on early engines) (80,000–200,000 km, €300–1,200).
Does the Mercedes-Benz GLB (X247) 2.0 d (Mercedes OM654) have a timing belt or a chain?
Chain.
Which oil does the Mercedes-Benz GLB (X247) 2.0 d (Mercedes OM654) need?
0W-20 / 5W-30 · MB 229.52 / 229.71 · ~6.5 L · every 15,000 km.
Sources and notes
Main sources for the faults of this engine:
Faults, intervals and prices are indicative and collected from public sources and owner experience; always rely on the service book and a qualified workshop. Test statistics: DVSA – Anonymised MOT tests and results, Open Government Licence v3.0. Dutch tests: RDW Open Data (CC0). Engine versions: EEA, monitoring of CO₂ emissions from new passenger cars (CC BY 4.0, DG CLIMA). Owner complaints: NHTSA ODI (public domain). Recalls: DVSA Vehicle Safety Branch Recalls Database, OGL v3.0. Brand and model names are trademarks of their owners and are used only to describe the vehicles. How we check the data →
Updated 29/10/2026