Tired of dealing with expensive and problematic air suspension on your 2007-2012 Mercedes-Benz GL450 (X164)? This conversion kit from Suncore is the permanent solution! It converts your air spring system to a traditional, reliable coil spring suspension. The kit includes two complete front struts and two rear springs – everything you need for the swap. The part number is 129M-31-4-7, and it supersedes the original Mercedes part numbers for those years. It's brand new in the box with a 1-year manufacturer warranty. The conversion isn't adjustable, but it's built to provide a sturdy, comfortable ride without the worry of air compressor failure or leaking air bags. If you're facing four-figure repair bills for your air suspension, this kit saves you a ton of money in the long run. A popular upgrade for GL450 owners who want simplicity and durability over the high-tech (but fragile) original system. Get your SUV back on the road with confidence!