⚠️ Mercedes-Benz manufacturer position
WIS describes tank module access from interior floor on V-Class; confirm EQV is electric before drain.
Vehicle information
| Make | Mercedes-Benz |
|---|---|
| Model | V-Class |
| Market status | Sold new in Great Britain — current W447 V-Class |
| Body styles | Large MPV / passenger van |
| Generations | W447 (2014–present UK) |
| Engine options | Diesel: 2.0 OM654 diesel on UK V-Class Electric: EQV electric — no diesel tank |
| Fuel tank capacity | Approximately 70 litres |
| Fuel system | Common-rail diesel with AdBlue on UK SCR models |
| Access method | Interior floor access panel on many V-Class — WIS verified |
| Anti-siphon | Yes |
| Service portal | Mercedes-Benz WIS / XENTRY Workshop (authorised dealers) |
Misfuel risk High
Diesel variants use common-rail injection at very high pressure; petrol in diesel destroys pump lubrication and can contaminate the entire fuel circuit within seconds of running.
If the engine was not started
Drain, filter, prime diesel circuit.
If the engine was started
Inspect HP system if petrol was run.
Access procedure
- Disconnect the negative battery terminal and relieve fuel system pressure per OEM procedure.
- Access the in-tank fuel pump module via the manufacturer-specified route (access panel or tank lowering).
- Drain contaminated fuel using approved recovery equipment into suitable containers for hazardous waste duty of care.
- Inspect the tank, sender unit, and lines; replace the fuel filter and any contaminated flexible lines as required.
- Reassemble, refill with the correct fuel grade, prime the low-pressure circuit, and check for leaks before start.
- If the engine was run on wrong fuel, follow OEM guidance for high-pressure pump, rail, and injector inspection before restart.
Frequently asked questions
What should I do if I put petrol in my Mercedes-Benz V-Class diesel?
Do not start the engine. Arrange OEM-method tank fuel extraction and hazardous waste disposal under UK duty of care. A GBIFDA-certified technician can document the procedure for insurers.
Does Mercedes-Benz warranty cover misfuel on a V-Class?
Manufacturer warranties typically exclude wrong fuel as misuse. Expect out-of-pocket or insurance-funded repair.
Can I siphon fuel from a Mercedes-Benz V-Class?
UK Mercedes-Benz models usually have anti-siphon filler necks; OEM information specifies pump-module or tank removal instead.
When are injectors replaced after misfuel on a V-Class?
If the engine ran on contaminated diesel, injectors and HP pump are inspected or replaced per Mercedes-Benz diagnostics; not always required if caught before start.
Need professional misfuel recovery?
Find a certified operator or read consumer guidance for your next steps.
Find an operator Consumer guidance