Hi, I own an e220d coupe 2018 and have a knocking noise coming from the n/s rear when driving on rough roads/Gravel lanes etc,I’ve had everything checked by a garage and have come to a conclusion it’s either the shock or top mount so I thought I’d take the trim apart in the boot and make sure nothing is loose and from what I can see the top of the shock bolts up into the boot from underneath with no nuts just 2 bolts anyone know if this is correct or are the nuts missing.?? It’s the same the other side so I’m guessing it must be right? Thanks.