Hi guys. I just buy last week a 4.8is...and the seller told me that he never use the up/down button from inside, so the suspension isnt working.
When i press the button, the middle led blings 3 times...
But every morning i find the car OK, with no air leaks.
I put Inpa on the X and i find this errors...but i dont have any erros on my dashboard.

116 reservoir pressure remain constant
50 Can bus

What can i do first ? What can i check first ?