If your Aston has the Volvo based Navigation system, the screen drives up and down from the dash with a small electric motor. Sometimes the gears on this break and require replacing. This is the kit you need to be able to replace the cogs. We can send you the repair sheet if you wish to undertake the job yourself, or, we can guide you an how to remove the ski slope/top cover and you can return the entire assembly to us for new cogs. The cost for us to do the repair including the cogs is £65.00. Return shipping is £15 by DHL.