Hello, I just wanted to mention this for anyone who wants a more permanent solution for the key. I always have problems with this key blanks breaking so i ended up finding someone who mills out a Metal key blank for the w123. They started selling them on eBay and are solid. I've had one for about 4 years with no issues. I'll add the link as a comment for anyone who wants one. I apologize for the weird looking link. I had to use a link shortener in order to fit it all in one comment.

https://rb.gy/6q0fd