saildoc

I recently trading my 2012 C63 BS for a 2013 C63 BS with the aero package I had always wanted. The car is immaculate with low miles the only bad thing for me is that it has had a LTH exhaust system installed and what I believe is a RennTech ECU mod. Too loud and too rough for my taste-love the factory AMG sound better. We in the process of changing the exhaust back to factory with a secondary cat delete. The problem is the ECU modifications-has anyone ever reversed back to factory? Can this be done by my local Mercedes dealer? (I have my work done at an excellent independent shop).
Thanks in advance.

NotABaller

I'll take care of you homie. How about you trade your 2012 CBS for my 2012 P31? I can even put the secondary cats and reso back on, and youd have basically full stock. You should jump on this offer

Kriston

You can flash back to stock files. Your dealer can do it, but not sure if you want to do it through the dealer as it may be problematic for warranty purposes down the road. Especially if they have it logged that your car was tuned aftermarket.

If the car has a renntech tune, there's nothing wrong with that. IF any third party tuner know these cars, its Renntech.

saildoc

Thanks. I'll see how the car drives with stock exhaust on it and this tune. The car is out of warranty so I could just have the dealer put it back to stock if that is something they can do.

SuckaGDog

I can't remember, but is your current Black Series completely catless? If so, that would definitely require a retune or flash black to stock when you put the factory primary cats back on.

Dealer can do the flash back to stock no problem.

saildoc

It has high flow cats from Weistech.

Going to go with factory primary cats and secondary cat delete.

bentz69

So will you be selling the headers? If so, what brand are they? I would be interested