We looked at a few other potential cars and decided this one was the best of the lot. Pulled the trigger yesterday and enjoyed the smooth, quiet ride of the W210 during the 35 miles trip home.
I had a closer look and the HB part # is 112 035 09 00. So, this is not one that falls under the recall however, I need to replace it if it is wobbly. It could be the dark stains of engine detail goop they sprayed all over everything creating the illusion of wobble.

I am a bit annoyed that someone had taken the operators manual book since I looked at the car last. Went to have a look last night to see what all the steering wheel function switches do and discovered the book missing.

This weekend I will change all the fluids, filters and have a close look at the HB. It looks to be a pretty easy job to replace compared to the old 617. Cleaner at least...