My S500 and R-Class both have airmatic and I'm really lucky I never had any major problems with the suspension. However, my business partner was not too lucky when his SL500 had problems with the front passenger side airmatic shock. You can buy them off ebay for $500.00 if you can find a good deal. I driven cars with airmatic and regular coil-over springs and I find the airmatic suspension to be a lot more comfortable. Also, why did you change your side mirrors?