Used Mercedes-Benz SLK Ignition Barrel

Yes, all generations of the Mercedes-Benz SLK (R170, R171, and R172) were fitted with a conventional ignition barrel in the steering column, used to start the car with a physical key or key-with-transponder. This is a genuine part on this model and can be sourced used from a breaker. If your SLK has a keyless start button instead, confirm with the breaker whether your specific car still has a barrel assembly behind the switch, as some later R172 cars differed in their ignition system layout.

These two cars are from different generations — the 2002 SLK is an R170 (1996–2004) and the 2006 SLK is an R171 (2004–2011), so the ignition barrel is very unlikely to be a direct swap. You should source a barrel from within the correct generation for your car. Confirm the exact part reference with the breaker against your registration to be certain.

For the ignition barrel, trim and engine variant do not affect fitment — the barrel sits in the steering column and is not specific to whether the car is an SLK200, SLK280, SLK300, or SLK350. What matters is the generation (R170, R171, or R172) and whether the key and transponder system matches. Source from the same generation and confirm the key type with the breaker.

A 2009 SLK is an R171, which ran from 2004 to 2011, and you should ask breakers specifically for an R171 ignition barrel. The key transponder system needs to match your car, so it is worth confirming with the breaker whether the barrel comes with the matching transponder ring, as this affects whether the immobiliser will accept it. Your registration is the best reference to give the breaker so they can pull the correct part.

The R171 received a facelift around 2008, but whether the ignition barrel changed across that update is not something to assume either way. Name the facelift year to the breaker and give them your registration, so they can confirm whether the barrel from a pre- or post-facelift car is the same part. Do not assume the parts are interchangeable across the facelift boundary without that confirmation.

Mercedes-Benz did share steering column and ignition barrel components across some models within the same era, so there is a possibility of interchange — for example, some R171-era parts were shared with the C-Class (W203/W204) — but this is not something to rely on without checking. Give the breaker your SLK's registration and ask them to cross-reference the part number against what they have available from donor vehicles. Never assume a barrel from another model will fit without that verification, especially given the transponder and immobiliser implications.