I have an epace D150. At around 4000 miles 5 months the service warning light started to illuminate during starting. The dealer said it was probably a computer glitch and nothing to worry about. The first service isn't due till 2 years or 24000 miles. Took it in today and they updated the main computer software. They said it could be due to carbon build up in the engine and said I would need an oil filter change for which they quoted £200 otherwise it would void the warranty because they thought I might have been doing short journeys. Apart from a visit to the local supermarket a couple of times a week much of our journeys are 40 to 250 mile motorway trips.