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Body Repairs - Vehicle Specific Information 501-26-13 and Tolerance Checks 501-26-13 DESCRIPTION AND OPERATION E140246 The reinforcements at the A- and B-pillars are made of Usibor steel. This material has a yield strength of 1300 MPa. Sectional repairs must NOT be performed on components made of Usibor ! The required continuous MIG weld seam in the cut area would cause structural changes in the steel and lead to a significant loss in strength. In the event of damage, the complete component must therefore always be renewed. Also, because of the strength of these components, it is not always possible to work them with conventional body repair tools. or welding work (resistance spot welding and inert gas puddle welding), additional preparation work and/or special welding equipment are required. Sheet metal parts for quarter panel partial replacement Single cab E140304 Double cab