Add Wish List Quick view Choose Options RaceChip XLR5 - Mercedes-Benz SL (R129) (from 1989) SL 55 AMG (354 HP/ 260 kW) Next-gen throttle response for your MB SL (R129) SL 55 AMG The RaceChip XLR5 is our latest throttle response controller with advanced calibration and ultra-precise response curves. The most refined... RRP: Was: Now: £199.00 - £249.00 Choose Options Compare