Compact class/small car up to 15,000€

Hello dear motor talker, since our Golf 4 after 330,000km now demands his well-deserved retirement I am looking for an alternative. Key data: Budget: up to 15,000€ EZ: from 2014 KM-Stand: less than 100,000 prefers under 70,000 petrol compact class or small cars (sometimes except smart, up and co. and no combo) desirable: Automatic (definitely no need) hazards will be about 20-25k km a year with relatively little highway a lot of highway. So no absolute PS monster must be. Had already looked towards Mazda 3, but there still seems to be the topic rust. I hope you have some great tips and ideas for me. Thank you!