I'm not questioning the replacement of the center link, but I always understood that the best way to tighten-up the steering was to get a new steering damper.
https://howtune.com/articles/204-rep...sler-crossfire
They are not expensive either plus an untrained orangutan can install a new one.
https://www.partsgeek.com/catalog/20...ng_damper.html (this is the OEM unit, as I understand it... not OE, but OEM) $32.58
https://www.mercedespartscenter.com/...per-1244630432 This is a DISCOUNT Mercedes-Benz dealership & yet they still want $80.40