Sprinter II 2007-2018
For 2002-2006 models, it is easy to change, plugs into plastic housing in the middle of the turbocharger output hose from intercooler to intake manifold.
For 2007 and later V6 models, you almost need a map and a compass to locate this sensor.
It is located between the passenger side turbo intercooler hose fitting and the air charge hose. Also used on OM651 4 cyl diesel from 2014 and later.