Buy the document forge factory i guess, there is a mission on the construction site at redwood lights track (there are 2 inside it, if you are lucky you'll get the mission with the Bodhi, you can steal it)
The mercedes GLS , xls in gta online a removed car added as part of finance and felony has amazing climbing capabilities, I escalated mount chiliad with a friend that was driving a jubilee (cullignan) not even close to my car 😢 Good old days....