Hello guys I bought a CLA 45 AMG that has a stage 1 optimization. The car has 408 hp and 540 NM on the hardware of the car nothing was changed. Now I wanted to install a downpipe without changing the software. I wrote to or called about ten different tuners on Ebay classifieds, none of them could tell me more precisely whether to customize the software or not. Five of them you can install without any problems without any problems. Four of them say the software has to be adapted because otherwise you will damage the engine. One says that the car would jump into the emergency run immediately. I hope you can create clarity here because I really don’t know who or what I should think I would like to thank you for any help I can get.