Used Mercedes-Benz Viano EGR Valve

Yes, but only on diesel-engined Vianos, which in practice means the vast majority of UK examples. The Viano was offered with several diesel units including the 2.0 CDI and 2.2 CDI engines, and all of these use exhaust gas recirculation as part of their emissions management. Petrol-engined Vianos were sold in some markets but are extremely rare in the UK, and a petrol Viano would not have a diesel-type EGR valve.

Engine code is the most important thing to get right here — the EGR valve is matched closely to the specific engine variant, so a 2.2 CDI unit (for example OM646) will not necessarily share its EGR valve with a 2.0 CDI unit even if the vehicles look identical from the outside. Check your V5C or look for the engine code stamped on the block, then give that code to the breaker when requesting a quote. Trim level, colour, and body length make no difference to which EGR valve you need.

The Mercedes-Benz Viano W639 ran from 2003 through to 2014 when it was replaced by the V-Class, with a notable refresh around 2010 that brought updated engines alongside styling changes. Because the 2010 refresh could introduce revised engine specifications and updated emissions calibration, an EGR valve from a pre-2010 Viano may not be a straight swap into a post-2010 car even if the engine displacement looks the same on paper. Confirm the exact engine code on both donor and recipient vehicles with the breaker before buying.

No — Ambiente, Trend, and Avantgarde are trim levels that affect interior specification, seats, and equipment, none of which has any bearing on the EGR valve or the engine it is bolted to. What matters is the engine code and the model year, not the trim badge. You can safely ignore trim level when searching, but always confirm engine code with the breaker.

2007 and 2012 Vianos both sit within the W639 generation, but the 2010 refresh period means there can be differences in engine specification and emissions equipment between these two years even where the displacement looks identical. A physically similar EGR valve from the wrong year or spec can cause running problems or emissions faults. Give the breaker the engine codes from both vehicles and let them confirm compatibility before you commit to buying.

Mercedes used shared engine families across several models of the same era, so there is a chance that an EGR valve from another Mercedes commercial or passenger vehicle with the same engine code could be compatible, but this is not something to assume. Emissions-era differences and software calibration can mean that a visually identical valve from a different application does not perform correctly or causes fault codes. Route this question to the breaker with both engine codes and they can advise whether a cross-model part is viable.