Hyundai maintains a digital archive. You can purchase a 24-hour or 72-hour subscription to Hyundai’s technical information system (www.hyundaitechinfo.com). Download every PDF for the Avega/XG300/XG350 during that window. This is the official source and costs roughly $20-30 USD.
Assuming you are looking for the (Elantra), I can provide you with the details on how to find the specific manual you need, as these are large documents not typically hosted directly in chat. manual book hyundai avega pdf
Having a manual book for your Hyundai Avega can be helpful in several ways: Hyundai maintains a digital archive