Mercedes-Benz SL400 hard ride issue with ADS panel replacement on Mercedes-Benz SL400

Some Mercedes-Benz SL400 owners report experiencing a hard ride issue potentially linked to the failure of the ADS (Adaptive Damping System) at higher mileages, which can result in costly repairs. A common cause of this rough ride is a faulty ADS Level Control Valve, also known as an ADS solenoid, which is connected to each air strut. For those considering modifications, replacing the ADS panel with regular shocks and springs is possible, but specific guidance may be needed for this process. Additionally, some owners find that switching to tires with softer sidewalls, such as Toyo tires, can help improve ride quality by enhancing compliance in the system. It is recommended to seek professional advice or detailed instructions when addressing these issues to ensure proper resolution.