Add Wish List Quick view Choose Options RaceChip XLR5 - Mercedes-Benz SLK-Class (R172) (from 2011) SLK 55 AMG (422 HP/ 310 kW) Next-gen throttle response for your MB SLK-Class (R172) SLK 55 AMG The RaceChip XLR5 is our latest throttle response controller with advanced calibration and ultra-precise response curves. The most... RRP: Was: Now: £199.00 - £249.00 Choose Options Compare