Arnott air bags
While Arnott is proud of our replacement springs and know them to be durable, given the heavy weight of the W251, they still could wear or dry-rot and pop a leak someday. That is why they come with a limited lifetime warranty. That warranty is not transferable so the next owner doesn't get replacements, and it does not cover shipping or labor.
Arnott doesn't have a Coil Conversion Kit for the R-Class (yet) but if we did we would want to make sure you are not towing anything heavy with the truck since typically springs can't adjust for too much added weight. The Arnott conversion kits we do manufacture provide a very nice ride - but they won't give you the same ride as air.
On my R500, I had to replace the pump under warranty at 20K miles and both front struts at around 72K. I took it as due to weight and possibly lower quality parts on the R, not sure.



