Originally Posted by louis_2012

As you stand looking at the engine, look down the right hand side of the block towards the back with the engine running, the previous 170 i owned the cable/cable clip snaps off the inlet and the clicking noise you can hear is the cable going in/out/in/out as the IMRC is trying to adjust the inlet flaps but cant due to it being snapped off. Also to note the injectors are quite noisy on these.