General description Rear air suspension shock strut spring designed for Mercedes-Benz GL-Class X164 and ML-Class W164 with Adaptive Damping System (ADS). This product is suitable for models manufactured between 2006 and 2018. Technical specifications Condition: Brand New Placement on Vehicle: Rear left + right Warranty: 2 years Quantity: 1 pair (for rear left + right side) Reference OE/OEM Numbers: 1643203031, 1643200731, 1643202031, 1643202731, 164320073160, 164320073180, 164320073188, 164320203160, 164320203180, 164320203188, 164320273160, 164320273180, 164320273188, 164 320 07 31, 164 320 0731, 164 320 20 31, 164 320 2031, 164 320 2731, 164 320 30 31, A1643200731, A164320073160, A164320073180, A164320073188, A1643202031, A164320203160, A164320203180, A164320203188, A1643202731, A164320273160, A164320273180, A164320273188, A1643203031, A164320303180, A164320303188 Installation Professional installation is recommended for optimal performance and safety. Usage This air suspension