Install a valved exhaust system
Install a cat-back exhaust
Install a performance muffler
Install resonator delete pipes
Install high-flow catalytic converters
Install an X-pipe or H-pipe if compatible
Use an ECU tune with exhaust valve control if available
Keep the exhaust valves open using a valve controller
Replace factory exhaust tips with larger-flow tips
Check for and remove any exhaust restrictions
Use a performance air intake to slightly increase engine sound
Ensure the exhaust system has no leaks
Use a cold-start setting or tune if supported
Consult a Mercedes specialist for compatible parts and local emissions laws