Not on a Mercedes. I re-soldered a seam on a Radiator and was driving on the Freeway when the seam split open even larger and by the time got off the freeway the engine was ruined. Traffic was heavy and I was 3 lanes from the side I needed to be on to find an off ramp.
I would not be fond of the sort of suggested repair.

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84 300D, 82 Volvo 244Gl Diesel