Is this what I think it is?




2013 P31, manufactured April 2013. Just started today, haven't driven in maybe a day and a half. Started up to this, sound fluctuates with rpm...
What am I in for, and what is it going to cost?
Last edited by G_Money; Feb 19, 2018 at 01:46 AM.




Kinda loud
ETA: completely quite again when warm. Changed the oil about 2.5k miles ago, it was done at an MB dealership.
Last edited by G_Money; Feb 19, 2018 at 02:12 AM.












Me and a friend that runs a Mercedes garage in the UK have the same experience with the M156.
Pull the rocker covers and see what the condition of the cam lobes are as well.




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