no sound from speakers at all one min works fine the next nothing.you would think they would work as i payed over £600 for the better system.next when you get out and press the key to lock it wont sometimes and you have to press open on remote and then lock again only to find the next time you get in the car all your settings are gone.next rear traffic alert is currently unavailable.next error park distance control fault.next you get in and the stearing wont unlock so you carnt start the car you have to get out lock it and then get back in.when i called to book it in they did not sound surprised so must get it alot.