Short answer
In a U.S. settlement with Daimler, EPA addressed emissions issues in certain Mercedes-Benz diesel vehicles, including Sprinter vans. Owners can check eligibility for the approved emission modification by VIN on the Mercedes-Benz Vans site. Separately, Mercedes-Benz has published guidance on EGR valve diagnosis and cleaning for the OM642 V6 used in Sprinters.
Safety first. Diesel injection systems run at extremely high pressure; a pinhole leak can inject fuel through skin. Exhaust and turbo parts stay very hot long after shutdown. Never open a hot cooling system. If you are unsure, stop and see a qualified diesel technician.
Start with the easy checks
- Look up your VIN on the official BlueTEC update site.
- Keep records of emissions modification work.
- If the van runs rough or loses power, have the EGR system checked.
Likely causes, most common first
- Carbon buildup in the EGR valve
- See the EGR page.
- DEF/SCR faults
- See the DEF page.
These are common causes, not a diagnosis. The same symptom can have a different cause on your engine; codes, tests and your service information decide.
When to stop and see a diesel tech
- Any emissions modification work is done by authorized dealers.
Questions
How do I know if my Sprinter is covered?
Check your VIN on the Mercedes-Benz Vans BlueTEC update site.
Related symptoms
Emissions
Can a clogged EGR valve cause rough running and low power?
Troubleshoot →EmissionsWhy does my diesel say DEF fault or "speed limited"?
Troubleshoot →EmissionsHow do I know if my diesel NOx sensor is bad?
Troubleshoot →Where this comes from
- Mercedes-Benz Vans: BlueTEC emission modification VIN lookup
- U.S. EPA: $1.5 billion settlement with Daimler over diesel emissions
- Mercedes-Benz: EGR valve diagnosis and cleaning, OM642 Sprinter (bulletin filed with NHTSA)
Last reviewed 2026-10-19. General information only: confirm with your service information and a qualified diesel technician.