As Army did, if you have "dampness" problems, it is best to rip out all of that sound deadening material and get to the metal. That fantastic undercoating MB did to the underside keeps all the moisture in the car and also holds all the crumbly metal together. Best to check the floorpan to sill weld joint all along the sides.

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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)