My trunk lid closing without slow down.What can I do for this ? What I need to change ? Or put something like suspension ?
Any experience ?

 

There are torsion bar springs in the trunk that are to counter balance the weight of the trunk lid. If you open the trunk and look under the parcel shelf, there should be 2 rods (the torsion springs) running from one side to the other. On one end of each spring is an adjustment for the tension. I will warn you that it is very hard to adjust.

Because of weight differences, there are different springs for trunks with a spoiler and trunks without a spoiler.

 

There is one option it seems for now, put a label it writes on please close the lid carefully