Just had the 507 serviced at MB and asked for engine and gearbox software to be checked to be 100% sure it’s not been altered, they confirmed it’s std as it left the factory. The service Manager did say there are software upgrades for the engine , which should improve fuel economy (slightly) and one for gearbox which should improve shift times. It will cost around £100 to have them applied , which in the scheme of things with a C63 is not a lot.
Has anyone had these done and was there any discernible difference?
Has anyone had these done and was there any discernible difference?