BAd material used on ,Mercedes Benz AMG

I have bought Mercedes Benz c200 Mag in 2016. at polokwane mercurioys a week after I bought it the rubbers from the doors went out.they fixed it.after two years the seat comers started peeling off,the one for the driver was worse,which shows the quality is poor.The rubbers from onother door also came out.I took it to Mercedes they said I have to pay 4000 to fix it because it has more than two years.i have a toyota yaris that I bought in 2008,the seats I still in tact.now what about her see a be z?why are they using poor quality on an expensive car?I will forever repair the accessories of this car due to poor quality material used.i m so disappointed.i don't enjoy this car.The driver seat is also peeling off on the upper of the seat,so I must pay onother 4000?Don't be fooled by the name.The material used is of poor quality.