10mm bolts should be torqued to 55Nm. 12mm bolts, 115Nm.

As RichardM98 correctly points out, MB requires all micro-encapsulated bolts be replaced. If you want to go "by-the-book" replace them. If a trip to the dealer is a PIA, you can apply a drop or two of removeable thread locker before re-using them. It'll work fine.