Installation:
With openIV, to reach: X:\Program Files\Grand Theft Auto V\update\x64\dlcpacks
and drag and drop the "sp_merit3" folder.
Then, go to: X:\Program Files\Grand Theft Auto V\update\update.rpf\common\data
Then click on the "Edit Mode" button on the left of the search bar, right click on "dlclist.xml" then click on edit and add on the last dlc <Item>dlcpacks:/sp_merit2/</Item> then save

Credits:
-11john11 for the steelies
-RooST4R for the other wheels and tyres
-AlyxandraVance for the improved handling
-AlexanderLB for the bumper stickers

Spawn codes:
-merit3
-taxi4