My January 2008 BMW 325 is due its first service check. Under BMW’s “conditioned-based servicing” I understand this is just an oil and filter change. The local dealership wants to charge £233 for this, which they say takes between 1 and 1.5 hours. If I go to another garage or mobile mechanic (which I believe I can do these days) and so long as they used approved parts, will they be able to access the car’s computer to confirm the work is done and re-set the computer and turn off the service light?