Issue with C250 W204 - engine management light on.

[Simon trobe]

So... got an issue this week with the C250 Estate. Engine management light came on so got Merc RAC out and they said it was the MAF sensor. Also to add to that Stratstone Merc Glasgow did the servicing, lost a bolt from the solenoid above the air filter and left the bolts slack alice around the air filter box. They are a bunch of useless *u**s so won’t be going back there. Any ideas ? Error I’m getting on the Snap-on is an air leak. Also is there an easy way to identify the bolts so I can buy one ?

 

[Simon trobe]

So I found the issue - Error codes P2279 and P2281. These point to the intercooler Turbo Hose Pipe having a split and it does.
forget the other codes as they are due to the engine being in limp mode.