Chassis Context
The 2014 Mercedes-Benz Sprinter NCV3 runs the NCV3 chassis, which launched in the UK in 2006 — a year ahead of North America. Most UK NCV3s carry the 2.1L four-cylinder diesel (OM646 until mid-2009, OM651 after) rather than the OM642 V6 that dominated the US market; badges read 209–519 CDI, with the first digit indicating tonnage and the last two roughly horsepower divided by ten. Euro 6 BlueTEC with AdBlue was optional from 2013 and standard on new registrations from September 2016 — earlier UK NCV3s have no AdBlue system at all. Check recalls at the DVSA vehicle recall service on gov.uk, not NHTSA. The SAM-module and ground-strap guidance familiar from Sprinter forums applies to UK vans exactly as it does elsewhere.
What's Specific to the 2014 Mercedes-Benz Sprinter NCV3
The 2014 UK Sprinter sits in the Euro 5/Euro 6 split years: Euro 6 BlueTEC (with the 18L AdBlue tank) was optional from 2013 and became effectively standard for new registrations in September 2016 — so a 2014 may or may not have AdBlue; check for the filler next to the diesel cap. Crucially for this build window: vans built October 2013 to June 2018 fall inside the May 2019 DVSA glow-plug-relay recall (114,800 RHD UK Sprinters — moisture ingress can short the relay, with a fire risk; the fix is a free ~30-minute relay and cover replacement). Verify yours at the gov.uk recall checker. MOT note: the visual DPF check has applied since February 2014.
Common Symptoms
Glow Plug Failure on the 2014 Mercedes-Benz Sprinter NCV3 typically presents with one or more of these symptoms. The severity, frequency, and diagnostic steps vary significantly by chassis generation, which is why the causes below are written specifically for the NCV3 of the 2014 production year rather than generic "Sprinter" advice.
Likely Causes for the 2014 Mercedes-Benz Sprinter NCV3
For the 2014 model year, the most common root causes involve age-related wear, the specific engineering tolerances of the 2014 production run, and documented chassis issues noted in the chassis context above.
Before any glow-plug diagnosis on a 2014: this van almost certainly falls inside the May 2019 DVSA recall of 114,800 RHD UK Sprinters (builds October 2013 to June 2018). The glow-plug relay — which also feeds the fuel-filter heater — can short from moisture ingress, with a smouldering/fire risk; the fix is a free ~30-minute relay and moisture-cover replacement at any Mercedes-Benz Vans dealer. Check the VIN at the gov.uk recall service first, then look at plugs and module. Seized plugs in the head remain the main mechanical risk on high-heat-cycle engines.
What to Do
Start by checking the most common causes listed above. For a step-by-step diagnosis specific to your symptoms, use our free AI Expert chat or the interactive diagnostic tool — both are trained specifically on Sprinter NCV3-based RVs and know the 2014 Mercedes-Benz Sprinter NCV3 inside and out.
Other 2014 Mercedes-Benz Sprinter NCV3 Issues
Owners of the 2014 Mercedes-Benz Sprinter NCV3 also commonly report these problems:
- Battery Drain
- DEF / AdBlue Warning
- DPF Regeneration Problems
- EGR Valve Problems
- Injector Seal Leak
- Limp Mode
Mercedes-Benz Sprinter NCV3 Glow Plug Failure by Year
This issue across other model years: 2011 · 2012 · 2013 · 2015 · 2016 · 2017