Hi guys, i got a C200 W03 2001 few days back. It has several errors but i'd like to start first with wiring issues and i believe the term is limp mode (gear would change sometimes, mostly not). Had to jumpstart after turning off for like an hour with ABS ESP SRS BAS error messages. Charging volt was ok as per battery vendor so changed new. Instrument cluster errors and limp mode remain. Previous owner had china dvd head unit which was dead. When placing it with Android head unit saw that the wires were all mixed with OEM, chinese harnesses, also several were tapped and without harness and no color code. Help currently needed on following,
1. Illumination Dimmer Wire missing into harness - 6 Orange (per diagram)
2. switched positive 12v - 7 Red
3. no power in cigrette lighter
4. windshield wiper dead

I have very little electrical knowledge in other words i'm a noob.
your help will be very much appreciated

Edit: pics of interior fuse box. Looks several fuses missing, pls help