Hi, I have a 2015 W205 C220 Sport with 65,000 miles. The car went into limp mode but no warning light on dashboard (couldn't get higher than 3rd Gear or use paddles to shift) A friendly independent garage scanned it and came up with “P0402.00 The flow in the exhaust gas recirculation (cylinder bank 1) is too high. There is a general failure (stored)” There was also a stored code relating to the Mass Airflow Sensor (P0101) My man said he had three theories but fully booked-up for weeks - 1. Valve in exhaust tailpipe stuck (I think this is for when it’s in SPORTS+ mode) 2. Servo and flap in the inlet manifold stuck 3. EGR valve faulty (He thinks the Mass Airflow error is a side-effect of the main problem) Clearing the stored codes meant the car was drivable again, but it needs looking at. For a few weeks prior to this I thought the engine sounded noisier than usual - sort of rasping as I accelerated from low speed. Also my MPG had dropped from a consistent 42mpg per tank to 38mpg The engine is bone dry - no sign of leak from injectors or turbo pipes. I'm booked into another independent Mercedes specialist next week. Does anyone have any experience or advice?