Coming from an AMG CLS I find the air suspension ride a bit floaty.

Of what car? S/P, +/D, air/coil, 19"/21"? You have to be more specific.

I came from the cls amg as well.. the tesla can't compare because it is several hundred lbs heavier.

hemants said:

Not a fair comparison of course but is there any way to stiffen the suspension?

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I thought that when I changed from coil to air, I thought something was wrong with the car the first time I drove it home. I've found that when the suspension is set to LOW, it's not that bad (or I just got used to it). I don't feel the "floatyness" in the P85D though.

It's hard to describe suspension feel, but I suspect the fact that you have a Sig may be a big part of the problem...early models were floaty all around. Later cars are much firmer.

Service centers can partly upgrade a Sig suspension, but it's fairly pricey. I think some people identified some parts for do-it-yourselfers, though I didn't pay much attention. Maybe look for threads by lolachampcar.