[speed12sil]

I know that there's a coilover conversion kit for W220, but cannot find such a thing for the W221. Is it possible to just use the W220 conversion kit in the W221? If not ,can anyone recommend an aftermarket brand air struts that do not exhibit the same problem as the MB ones, or those would leak and collapse too?

Sorry I'm a newbie when it comes to W220/221 so