PowerBox CR Performance Diesel Chiptuning Tuningchip Module for MERCEDES GL 320 CDI 165 KW / 224PS / 510 NM - more power less fuel Power Increase: 190KW / 258PS / 600NM Made in Germany Improved fuel efficiency (an average of 2.5 MPG) Includes OEM plugs (no soldering required) Easy installation (instructions included)