W211 SLS spring conversion done but questions.

[Goseba]

I had the rear SLS on my 2003 wagon replaced by the Arnott spring kit after an airbag failed. The ride seems so much better now.

I have two questions now though.

The garage that did the conversion for me use AutoLogic. Is it possible with this to stop the error message I get now to 'visit workshop' due to the suspension change?

A couple of times with passengers in the back seats, the suspension seems to thud as if bottoming out when I go over a speed bump.
Would rubber coil spring assisters help with this?
The car does seem to be sitting slightly lower than before.

Thanks.

 

[Goseba]

Added coil spring assisters which raised the back slightly, drives and feels so much more positive now.

But is it possible to stop the error message 'visit workshop' due to the suspension change?