As I've been driving down the motorway today this message flashed up 'check oil level at next refuelling'. The car is 6500 miles away from a 'C' service, so could this be anything to do with the Brabus box? This is my fourth 211 and I've never had that come up on the dash. I was in two minds whether to get it serviced early for piece of mind and I think that this might bring that forward. Any thoughts people?