1663200325 Pair Left & Right Rear Air Ride Suspension Spring Bag Fits for Mercedes Benz 2005-2015 X164 X166 W164 W166 GL-Class GL320 GL350 GL450 GL550 ML-CLASS ML320 ML350 ML450 ML500 ML550 ML63 AMG

Though website said not compatible for 2017 GLS-450 rear Air spring but it worked. I did research on several websites for best fit for this vehicle. Found this at much less cost. Took a chance and here you go. The quality of these Air spring appears good. Hope it holds up for long. The installation was super smooth. All you need to do is, remove the wheel followed by removing air hose connector on Air spring using 10MM combination wrench.

Very good

Excelente producto 100 % recomendable.

I was skeptial at first but decided to give it a try due to the significant cost savings. All parts and fittings were included in the box. It takes a 10mm wrench to connect the airline. The installation was easy and it went very well. The bags were stiff at first and vehicle was higher than normal but they settled in a couple of days.

overall the part was good. I was not Able to use the airline fittings that came with the shocks they were too tight. I ended up sourcing the fittings from Mercedes directly eight dollars apiece nothing major and after that they worked perfect. I installed this on a 2014 GL 450