Hey, give us whole manual, please
Actually mitchel on demand schematics are easier to read
Here it is , I hope it will work with western IP's and sometimes that page doesn't work. To go to audi, pick Audi on left menu, then pick "Принципиальные схемы", then "Принципиальные схемы из Mitchell On-Demand", then choose year, model etc. Note - mitchell on demand schematics are american, so keep in mind americans got audis one year later than europeans.
Ok, back to topic. If I understand correctly, low beams and high beams doesn't work and works only side markers + interior lights? Sounds like light switch doesn't work
Do u have rounded switches or old non-rounded ones? Rounded switches can be opened and contacts cleaned. To prevent that in future, relays for headlights must be used.