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No two ignition switchs are quite the same across different vehicles, so getting the specifics right matters when you buy used, second hand or a replacement. Answer a few quick questions below and breakers will only quote if they have the exact matching part in stock:
The Vito does have an ignition switch, used to start the engine and activate the vehicle's electrics — it sits in the steering column assembly and is a genuine, fittable part. However, some later W447 Vitos (2014 onwards) may use a push-button start system depending on specification, so the traditional barrel-type ignition switch may not be present on all variants. Check whether your van has a key barrel or a push-start button before ordering, and confirm with the breaker against your registration.
The W639 and W447 are entirely different generations with distinct steering column designs, so an ignition switch from a W639 is very unlikely to be compatible with a W447. This is a clear generation boundary, and parts from either side of the 2014 changeover should be treated as non-interchangeable. Confirm this against your registration with the breaker before purchasing.
Yes — generation is the most important factor for ignition switch fitment on the Vito, as each generation uses a different steering column and switch design. A W638 switch will not suit a W639 or W447, and vice versa, so always match the part to the correct generation. Give the breaker your registration to make sure you get the right unit.
Trim level does not affect the ignition switch itself — a base Vito and a higher-spec Tourer within the same generation use the same switch. Bear in mind that the V-Class is a separate model on the same platform, and while there may be crossover, you should confirm with the breaker rather than assume. The key variable is generation, not trim or equipment level.
The ignition switch is part of the steering column electrical system and is not engine-specific, so engine type — diesel or petrol — does not determine which switch is fitted. What matters is the generation of the van, so focus on matching the W638, W639, or W447 designation rather than the engine code. Confirm with the breaker against your registration to be safe.
Both 2008 and 2013 Vitos fall within the W639 generation (2003–2014), so there is a reasonable chance the ignition switch will be compatible. However, Mercedes did make running changes within the W639's production life, so fitment across the full span of the generation is not guaranteed. Confirm with the breaker using both registrations before buying.