General description Rear Air Shock Absorber without ADS Electronic Sensor designed specifically for Mercedes R-Class models (W251) from 2006 to 2010. This product is not suitable for vehicles equipped with ADS, as it does not include a sensor. It is an aftermarket solution that replaces the original rear air springs, providing enhanced comfort and performance. Technical specifications Reference OE/OEM Numbers: 2513200631, A2513200631, 251 320 06 31, 2513200731, A2513200731, 251 320 07 31, 2513201331, A2513201331, 251 320 13 31, 2513201431, A2513201431, 251 320 14 31, 2513202131, A2513202131, 251 320 21 31, 2513202231, A2513202231, 251 320 22 31, 2513202331, A2513202331, 251 320 23 31 Warranty: 2 Years Compatible with rear left or right side Compatibility and accessories Compatible with Mercedes-Benz R-Class models (W251, V251) including: R 280 (01.07 -), 2996 ccm, 170 kW, 231 hp R 350 (01.07 - 12.09), 3498 ccm, 200 kW, 272 hp R 500 (01.06 - 04.07), 4966 ccm, 225 kW, 306 hp R 63 AMG