Hello! I've got a 1995 E220, and I just noticed a huge scratch on the wood panelling/veneer. Anyway to fix it?

That depends...if the scratch is into the wood itself (a color change of bare wood will be evident) then there is really not much you can do. If it is in the coating protecting the wood then you can fix that. Think of that coating as the paint on your car. A scrach can be buffed off/out. Some Meguiar's #9 and some gentle patience should yield some improvement. After your done, be sure to use Meguair's Mirror Glaze #26 yellow wax to protect your hard work.

Best of Luck....Lee