the main reason i bought strutmasters for my sl500 is because they were advertised made in usa with high grade materials but when they arrived they had stickers that said made in china ....so that's how i was lured in and once they got your money you have to jump through hoops to get a refund and you have to pay a $200 restocking fee plus shipping ...so it took 9 days from the day i ordered plus a couple of weeks to get a partial refund so i decided to try them on and here's what i got for $2105.15 now my car squeaks and squeals ,the rear bottoms out constantly and rides like a tunaboat so filed a complaint with BBB but the ignored it...so i have no choice only small claims court......beware they are the worst ripoffs