Hi All,
I've just joined the forum. Own a 2016 1.6 diesel Mercedes done only 37000 miles and engine management light has come up and shown insufficient flow. Merc dealership has recommended replacing the valve but with a hefty price tag. Other specialists claim that there are two EGR valves, not one, now that's a problem and most of the garages have put their hands up. Besides the annoying light on the dash it's running fine. Any suggestions?