Tell us more about the m113k. I have it in my CLS55. Bought the car with 58000 on the clock. Had it dyno mapped at about 70000 miles. 520bhp and 770newtons. It's never stressed. Does everything from shopping trips to autobahn batshit.Tbh I found a 5.5 bi-turbo crushing over the m156.
As far as reliability go’s I’m sticking
with the m113k.