Originally Posted by Eurosport
while the system is nice, can't help but to think of BMW X5's had issues with the air suspension, many 2003-2006 Mercedes had issues with air suspension, from control modules, to leaking air, to pumps, what would make this system as reliable as a shock/spring setup available in the Limited? not to mention 1st year production, spells to me like get ready to be in the shop
There's always more risk when you're talking about a relatively complicated suspension system. You're right that there are control modules, tanks, pumps, etc. that all have the potential to fail. On the other hand, conventional coil springs are very reliable, but they do tend to droop/sag over time. Fortunately, they are easy and inexpensive to replace.
If you're really worried about reliability, just skip the air suspension and go with the coil springs instead.