Mercedes :: essays research papers

The 1996 Mercedes E320 sustained crash damage to the passenger side front. After we set up and measured the vehicle on the caro-liner frame rack, we found there to be extensive panel, sub frame, and suspension damage. Including consequential interior damage, IE; Driver/passenger airbags deployed, dash panel assembly, and passenger airbags deployed, dash panel assembly, and passenger side mirror. After a complete damage assessment report, we then began disassembly of all damaged panels and assemblies. After the disassembly we decided which parts would be salvaged off of our 1997 Mercedes E320, which parts would be purchased new or those which would need to be straightened and refinished. Once the damaged panels were removed we were able to attach the 10-ton hydraulic ram assembly to the frame rack and began the frame straightening repairs. Our initial pulls were to fix the sway problem of the passenger side front sub frame. This was accomplished by wrapping a chain around the misaligned sub frame, pulling in a straight, level manner opposite the direction of the misalignment. We did several pulls in this manner, stress relieving, before and during, with a ball peen hammer before repositioning for the next pull until brought back into specification. We then positioned our 10-ton ram to the passenger front for repair of the frame rail mash and sag situation sustained on impact. We wrapped the chain around crash impact bar and used it as the hook up point for our pulls. Pulling and stress receiving until it also was within specifications. Our final pull was to the suspension passenger side A-arm. We simply attached our chains to the A-arm and pulled it back into positio n. At this point, we could now begin sectioning and panel removal. This was first done by deciding which panels were to be removed and which were to be repaired. Then all of the spot welds that needed to be removed were marked with a paint marker, so as to only to remove the necessary welds. Some spot welds were located underneath seam sealer and or insulation. We then removed the material with a hand torch to burn the seam sealer, then a steel bristled brush to scratch off the burnt material. We then center drilled all of the marked spot welds with an 1/8† drill bit, followed up by a 5/16† spot weld removal bit to drill out the spot welds along all of the panels to be removed.