I total agree with your statement regarding the appearance of the bolts. I purchased these bolts prior to removing the trans and did not have mine to reference. I was assured they were the correct bolts when I ordered them. VERY frustrated. I attempted to order everything in advance so the car would be down the least amount of time. Now I'm stuck trying to figure out these bolts. I was hoping someone here had experience with this issue.I would check with your dealer since I think the bolts on the left are for the auto flexplate and they are stretch bolts. The ones on the right look like the manual flywheel bolts.
As far as checking with my local dealer, I will not be going back there unless absolutely necessary. I went there in person to order these bolts. I was in my military uniform. I was literally ignored and pushed to the side when a glitzy Barbie doll chick wanted to purchase a rhinestone key ring for her new MB. When the parts guy finally got around to helping me, he totally treated me like a second-class citizen and even rolled his eyes when he had to look up the parts.
I would sincerely appreciate a recommendation to a good internet source of MB parts.