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How to Reset the Automatic Gearbox of the Smart?

Model: Smart Smart 451 - Years: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
Part: Warning light – error code

See other generations:
Video tutorial

When the letter N flashes on the Smart's instrument cluster, it indicates a fault in the vehicle's automatic gearbox. To temporarily resolve this issue, engage the gear while the engine is off. Then, with the gear engaged and the ignition key in position two, push the car so that it can be started.

Once the clutch is released during the pushing operation, the car will start. However, you should promptly visit a workshop for a diagnosis to identify the cause of the fault, which is often electronic in nature.


Updated on 15 September 2026 by ScegliAuto


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