R350 Air Mass sensor

[sweeper]

Hi
I have been experiencing occasional loss of power, only done it twice, both times on start up or maybe just after, no warning lamps, engine running smooth etc. so the plan is to hook my diagnostic tool up and take some readings next time it does it, I believe it may be the turbo or actuator, bu the Air Mass Sensor could also be the culprit, only thing is, although I have readings for the sensor according to my diagnostic tool i'm pretty sure the car doesn't have a Air Mass Sensor relying on manifold pressure, temperature and engine speed and to work out the airflow, car is the R350cdi 2011 model, anyone familiar with these models without air mass sensors? I cant see it in the parts list and can't find it on the car itself although I believe earlier models may have been fitted with them.

Thanks

 

[sweeper]

i've found the air mass meter, it is part of the crossover pipe from aircleaners to turbo, only available as a unit from mercedes, at a ridiculous price of course there looks to be one for each filter so i think if one was playing up it would pick up the different reading and pull up a fault.