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How to Replace the Remote Key Battery of the Smart Forfour

Model: Smart Smart 454, Fourfour1 - Years 2004-2006
Part: Key

In this video, see how to disassemble the key of the Smart Fortwo and Forfour to replace the exhausted battery. Start by getting a screwdriver (or another pointed object) and pry open the key casing halfway. Once done, you can extract the battery from its slot and replace it with a new CR 2016 3V battery; it can be purchased online or at general spare parts shops. Now test if the key works correctly in all its functions. As seen, this is a simple and quick operation.

Updated on 2 May 2026 by ScegliAuto

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How to Reset the Central Locking of the Volkswagen Golf 4?

If the central locking system of the Volkswagen Golf 4 is not working, it is likely necessary to reset the system: to do this, open the driver's door and detach the side panel of the dashboard next to the steering wheel. Under this panel, you will find the fuses, including the one for the central locking, which is indicated in the manual as number 14. To reset the system, remove this fuse from its housing, then reinsert it or replace it with a new one of the same amperage: this will reset the central locking system.

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