There is a huge debate over whether you should use the clips that come with the replacement chain, or buy the new link and crush the pins. The advice that I got, and followed when I did my chain, was to use the single clip that came with the MB chain. Randy Starkie did the same with the Iwis clips on his 380.
I also read the posts on this and the deciding factors were
1. that no one ever reported a failure because of the clip
2. the manual does not mention the crimping when installing a replacement chain, only the use of the clip
3. the clip would probably be more effective than my amateur peening.
I know this is a sensitive subject and I respect others' opinions.
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe