I could understand if this was a 300 turbo coupe, but a 240D? Why???
Nice work though and I suppose it's good training for 113 work later on. Lead is very toxic stuff and that alone is why it's not used much these days. Most body men can't work with it, paint and primer often won't stick to it, and modern fillers are considerably better in most regards. Back when lead was commonly used, mig welders weren't used very much for body work and most panels were brazed on or the really good body men used a small torch to fuse panels together. Done properly, no filler rod is used and no body filler is even needed to finish the seam.