ALways a difficult one to answer, a standard service then anyone does same as MOT but when you want something fixing and checking out properly then Im afriad it really needs to be someone with the right equipment to check/diagnose. Im sure more than just the dealers have the facility to plug into the management system but it can be an expensive "toy" for some. BUt for just a plain service and MOT why pay dealer prices so long as your friend does a proper check on everything like pads etc. These systems are all good and well to identify something is not working but when everything is working then it tells you sweetFA,