'til I wreck my Audi
In the previous line he says racing with Marcus Garvey, as in following his path and trying to eventually reach the “finish line” of getting back to his roots. And that he’s on the freeway, in other words going fast and won’t stop until he wrecks his Audi, in this case the Audi is his carrier/his body (physical or mental). And he implies the wrecking will be done by the government (reference to the system he doesn’t like) who is rumored to kill positive, influential leaders. (view autopsy and see exactly where…) Racing to Africa to chase your roots but not achieving your goal because you wrecked your high end German vehicle implies a sense of sarcasm and implies that it is a complex task to leave the lavish-materialistic lifestyle of the United States.
To help improve the meaning of these lyrics, visit "HiiiPower" by Kendrick Lamar Lyrics and leave a comment on the lyrics box