For insurance, search the diesel and tech threads.

For body repair, try Body Repair - PeachParts Mercedes ShopForum

For older daily driver type cars value is usually low enough that the retail cost of repairs exceeds "market value" is the insurance co will try to list the car as a total loss. I{f you have comprehensive insurance, you will be dealing with your co, if you have just laibility, you will be dealing with the other guys if he has any.

Pictures would be helpful in assessing the level of damage.