SPC Performance Camber/Caster Cam Chrysler Crossfire / Mercedes C Class, C36, C43, C63, CL500, CL, CLK, CLS, E Class, GLK. S Class, SLKAdjust camber or caster 0. 3 using the factory offset in the lower control arm bushings of many C Class platforms. Place the grooved bolt in the forward arm's bushing to change caster or in the rearward arm's bushing to change camber. If both camber and caster change are needed, you can use 2 kits. SPC uses a hex chromate free finish and offers a 700hr salt spray test for the best corrosion protection available.