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Please can anyone help? I have an automatic 2014 CLA 220, it has been losing power intermittently for a while, the engine management light comes on and it sometimes struggles to move up a gear. It's been in to 2 garages, plugged into the diagnostics and brings up faults but when all parts were checked they were all fine.

The last garage was sure it needed a new turbo so I had it replaced and its no better!

These are the 2 faults stored on the display at the moment...any idea what the problem is?

P0299-00 The boost pressure of turbocharger 1 is too low
and
P0476-22 Exhaust gas recirculation actuator 1 (Low Pressure)

Thanks in advance for any help
 
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