So my 2017 S-Class has developed this really annoying knocking sound from the rear suspension whenever I go over even the smallest bump and it's driving me absolutely mental. I've had it checked by two different places already and neither of them could figure out what's causing it, they just tightened a few bolts and sent me on my way but the noise came back within a couple of days. I'm starting to think it might be something more serious like worn bushings or maybe even an issue with the air suspension components, which is obviously not something I want to mess around with given how complex these systems are. The thing is I really don't trust just any garage with this car because I've learned the hard way that these modern Mercedes need proper diagnostic equipment and mechanics who actually understand the intricacies of the ABC suspension. I've been searching for a Genuine Mercedes-Benz repair workshop in Musaffah Abu Dhabi that specifically deals with S-Class models but the problem is there's so many places claiming to be specialists and most of them are anything but. I don't mind paying a fair price for quality work, I just want someone who can actually pinpoint the problem and fix it properly the first time without all the guesswork. Has anyone here had similar suspension issues with their S-Class and found somewhere decent that sorted it out? Really need some solid recommendations before I lose my mind over this noise.