We just installed our Fabspeed Performance Package on a 2007 Mercedes S65. We were looking for a more aggressive sound and increase in power. So we went with a custom performance exhaust upgrade with dual tips and the EVOMS ECU tune for added power and improved response to compliment the exhaust upgrade. This really gave it a nice deep growl outside but perfect inside the car.

The stock mufflers are very large and restrictive so the car stock is very quiet and the new exhaust really woke the car up. He loves the sound and power increase and he's happy with the new look. PM or Email Jeremy@fabspeed.com if you have any questions about upgrades for your Mercedes. Check the pictures below of the new mufflers installed and Dyno results. Be sure to also check out the video.
Thanks,

Mercedes S65 Performance Package Video: YouTube - Mercedes Benz S65 Fabspeed *Teaser*