What number is the fuse for the rear brake lights on a citroen c5?

The fuse for the rear brake lights on a Citroën C5 is typically located in the fuse box under the dashboard or in the engine compartment, depending on the model year. For most versions, it is usually Fuse 8 or 9, but it's best to consult the owner's manual for the specific location and number for your model. If you're unsure, checking the fuse box cover can also provide a diagram for reference.