It's all nuts and bolts plus some technique. This is a DIY job, but a bit more advanced than doing regular maintenance. The tricky part is using the proper sealant (Loctite 5900, or MB# 002 989 73 20 10) at the corners and metal-to-metal surfaces, avoid using sealant at the u-shaped seal, and installing the cover without rolling or damaging the seal.

For more information, search using keywords "upper timing cover seal" or "u-shaped seal".

__________________
95 E320 Cabriolet, 169K