Air helper springs in the coils should work, although be prepared for the "gronk" sound that often accompany the two together.

It would be interesting to see if an air replacement were available for the coils, I would love to have an air-ride 'Benz. I hate to make the comparison, but my '01 Town Car with air suspension in the rear rode pretty nice and great self-leveling can be had with a simple limit-switch on the rear suspension as the Town Car / Grand Marquis (and others) have.

Air suspension kits are big in aftermarket, the big push is for replacing hydraulics in low-riders et al.

Put together a kit and you might find buyers. You could also offer a replacement for the expensive SLS (which is really a great system when working properly) on the TD/TE cars.

- Jeff

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Gone to the dark side

- Jeff