I have a 1985 W123 300D Turbo California version, with 72,000 miles on the odometer, which was in a rear end collision back in October 2014. We had a repair shop repair the right rear end side member, quarter panel, trunk pieces etc. However the job was largely done incorrectly with harvested clip pieces. We are now doing a second phase collision repair with a reputable body shop with knowledge in older model Mercedes.

My main question is in regards to the repair of the rear right side member (part# 123-610-02-10) (luckily the left side was largely unharmed in the collision). Is it best to replace the entire side member, or is sectioning sufficient? My concern is long term value of the vehicle. All other components of the car are pristine. The original owner had it garaged, all paperwork intact, clean interior, etc.

Any advise/perspective would be appreciated.