You must install version 4.0, then 4.1, 5.0, 5.1, and finally 5.2. You cannot jump straight to 5.2 without the base files.
Precise electrical schematics that are essential for troubleshooting sensors, ECUs, and lighting. ELSAWIN 5.2 MEGA DOWNLOAD - MHH AUTO - Page 1
Detailed instructions for engine overhauls, gearbox repairs, and suspension work. You must install version 4