W204 2013 c class 220 cdi

[Wee Willie winkie]

My car has now been in the local garage 3 times as it holds onto gears loses power and th EML comes on. On each occasion they say the code is the turbo pressure sensor and replace the MAF sensor. That sorts it for between 2 and 5k is miles then it recurs.

They've now said they can't identify the issue and said take it to mercedes the nearest being 50 miles away.

To be fair to them they only charged me for the first it was in and that was the 88 quid.

Anyone any ideas? I'm fairly competent and do all my own stuff except diagnostics

[Wee Willie winkie]

So just in case anyone was interested it turned out to be the inlet manifold