Driving my wife's 2011 A180cdi yesterday and the message "Reduce oil level" comes on. We were a bit late for a function and I'd been driving at about 75 mph + for about 20 miles when it came on . It happened about 3 years ago as well and the mobile MB mobilo tech advised changing the oil completely because h8e believed that excess diesel from doing short trips was getting into the oil.
Any thoughts on this and what's the probable cause ??
Any thoughts on this and what's the probable cause ??