Here is the YouTube of a s63 tear down and complete rebuild. You can follow the segments. He also gives a great side by side of n/s 63 parts.
Makes one appreciate your mechanic more! Timing, proper torquing, shop organization, electrical connections, etc., etc.
Have fun! And don't gap your own plugs!!!! Just buy OEM pre gapped. If you read about s63 fuel injector pressures, there is critical engineering in place to avoiding washing cylinder walls with fuel and removing engine oil!!