Second Hand Mercedes-Benz Viano Exhaust Manifold

Yes, all engine variants of the Mercedes-Benz Viano (W639, produced 2003–2014) have an exhaust manifold — it is the cast-iron or steel collector that gathers exhaust gases from the cylinder head and routes them into the rest of the exhaust system. Both the diesel CDI engines and the petrol V6 engines fitted to the Viano use one, though the design differs between them. Make sure you are searching by your specific engine code rather than just 'Viano exhaust manifold', as the parts are not interchangeable across engine families.

The W639 Viano received a significant facelift in 2010, and while the core body architecture carried over, the engine lineup was updated — notably the CDI units were revised to meet tightening emissions standards, which can mean changes to the exhaust manifold itself. Whether a manifold from a pre-facelift example fits a post-2010 car depends heavily on your exact engine code, so name the boundary confidently: a 2009 car and a 2012 car may look similar but the manifolds may not be compatible. Always confirm with the breaker by quoting your full registration and engine code before buying.

Yes — this is one of the most critical fitment points. The diesel CDI manifolds and the petrol V6 manifolds are entirely different castings with different port patterns, flanges, and mounting faces, and they will not interchange under any circumstances. Always confirm which fuel type your Viano runs before requesting a quote, and provide your engine code (for example 642 for the 3.0 CDI) to the breaker so they can match the correct unit.

No, trim level has no bearing on exhaust manifold fitment for the Viano — the manifold is determined entirely by the engine code and emissions era, not by whether your van is an Ambiente, Trend, or Avantgarde. You may find cosmetic or interior differences between these trims, but under the bonnet the exhaust hardware follows the engine specification. Focus your search on matching the engine code and model year rather than the trim badge.

The 2.2 CDI engine (OM651) used in later W639 Vianos differs from the earlier 2.2 CDI unit (OM646), so even though both are badged '2.2 CDI' they are not the same engine and their exhaust manifolds are unlikely to be interchangeable. The switch broadly aligns with the 2010 facelift period, so a 2008 manifold and a 2012 manifold are from different engine generations. Confirm your exact engine code with your breaker — they can cross-reference by registration to make sure the manifold matches your specific block.

Yes, emissions era matters because the exhaust manifold is part of the system that feeds gases into the catalytic converter and, on later models, the DPF — changes in emissions standards between Euro 4 and Euro 5 (broadly the 2011 boundary for vans in the UK) can affect manifold design and downstream fitment. Fitting a manifold from the wrong emissions era may cause issues with how downstream components seal or mount, and could affect your MOT. Specifics around catalytic converter and DPF compatibility with a given manifold are strong confirm-with-the-breaker territory — provide your registration and engine code and let them verify the full system match.