If there were an acceptable reason for this, they could have said it here: https://shop.mbusa.com/en-us/connect/pdp/Acceleration-Increase/709 https://shop.mbusa

If there were an acceptable reason for this, they could have said it here: https://shop.mbusa.com/en-us/connect/pdp/Acceleration-Increase/709 https://shop.mbusa.com/en-us/connect/pdp/Acceleration-Increa.... They chose not to, which means either there is no danger associated with this change, or there is and they're selling a dangerous add-on without informing customers.