Hello,

I'm not very skilled when it comes to cars so please bare with me.
I had a diagnostics done.

Air Suspension Faults-
-5- front left signal incorrect
-6- front right signal incorrect
-10- vehicle speed fault
-19- cannot lower rear left
-29- rear left valve stuck closed

Anyone got any knowledge or experience?

First step is to clear all the faults and see what comes back.

How is the suspension actually behaving? Is it sitting down on one corner, etc? Do you have EAS Fault on the dashboard and all 4 lights lit on the switch?

Welcome to Landyzone btw. General decorum is to post something in the "Introduce Yourself" section first before launching in to technical questions. There are some very knowledgable people on here, but they can be a bit grumpy until you've made your introduction.