Clive, how was the EGR pipe cleaned 8 months ago? A MB tech advised me that he removes the intake manifold in order to access/remove the EGR pipe, then uses Berkebile 2+2 Gum Cutter to unplug the pipe. Inserting a flex cable from the EGR valve towards the intake manifold will not clean the EGR pipe adequately. Obviously it's a more difficult DIY job to do it the right way, and more costly to pay someone else to do it the right way.

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Fred Hoelzle