Unlike the driver-only memory system in the M4, the GranTurismo has standard driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position, outside mirror angle, climate settings and radio stations and the front passenger seat also adjusts to the new passenger’s preset preferences.
The GranTurismo’s instruments include an oil pressure gauge and a temperature gauge - which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The M4 has neither an oil pressure gauge nor a temperature gauge.
Heated windshield washer nozzles are standard on the GranTurismo to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The M4 doesn’t offer heated windshield washer nozzles.
To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the GranTurismo has standard extendable sun visors. The M4 doesn’t offer extendable visors.
The GranTurismo has a standard center folding armrest for the rear passengers. A center armrest helps make rear passengers more comfortable and it can provide a boundary between children. The M4 doesn’t offer a rear seat center armrest.