Pedal Commander throttle response controller PC36 for Mercedes - get increased performance or save fuel up to 20% - Available for C-Class, ML-Class, E-Class, S-Class, SL-Class, etc. ELIMINATE RESPONSE DELAYS in your Mercedes acceleration EASY plug-&-play installation that DOES NOT void your warranty 4 adjustable modes: Eco, City, Sport, Sport+ Improve FUEL ECONOMY up to 20% in your Mercedes with ECO mode PLEASE CHECK DESCRIPTION AND AMAZON FITMENT GUIDE FOR YOUR VEHICLE FITMENT INFO C-Class (2001 - 2007) CL-Class (2000 - 2014) CLS-Class (2005 - 2010) CLC-Class (2008 - 2011) E-Class (1996 - 2009) G-Class (2000 and newer) GL-Class (2007 - 2012) ML-Class (1995 - 2011) S-Class (1998 - 2014) SL-Class (2001 - 2008) Allows you to maximize fuel economy up to 20% over the stock ratings. It also doubles as a valet mode to keep a driver (or even your newly licensed teenager) from being able to accelerate above a certain rate. Many of our customers say that city mode allows the vehicle to accelerate as it should have from the factory. It gives you the response of an &#034;old school&#034; throttle cable, with a 1:1 pedal-to-throttle acceleration ratio. Gives any vehicle the response and acceleration of a race car, allowing you to get up and go when you need to without waiting for the ECU to catch up to your foot. Perfect for spirited driving or on a race track. Please use with caution!