Best option to purchase new diff cover & rectifier?

1. Buy the rectifier (part number A171 351 01 08, ca 85$; part 200 in the attached drawing) and the 2 bolts needed to attach it (part N000000 001536)
2. Buy Differential cover (A204 351 06 08, ca 205$, part 30 in the drawing)

https://fluidmotorunion.com/c63-amg-custom-diff-cover/
171-351-00-00 Heat Sink $74.36 1
000000-001536 Tensioner Bolt $5.33 2
204-351-06-08 Axle Cover $179.48 1
Price may be different now







