If your not happy with your $500K Mercedes SLS, then why not put some styling and power to it with RennTech. RennTech is a premier Mercedes Benz tuner and they have released full tuning packages for the SLS. Their Stage 2 power kit gives you an additional 70HP over stock. With a strong ECU tune and intake/exhaust components, the SLS is transformed further to a road warrior. Check out all the RennTech Products for Mercedes Here.