Sagging Fabric Roof Lining of Audi A4 replaced with PU Leather Roof Lining. Before and After pictures for reference. Most German cars after 5 years tend to develop this issue. @Carspark, we use high quality PU Leather to replace the fabric roof lining. PU leather has considerably low risk of sagging compared to fabric and also it is easier to maintain and clean. For queries, visit CARSPARK or call us @9962600500/8015500600