Mulears,

I would not have a hitch system on the W210 that did not include attachment to the unibody, and rear bumper, with the emphasis on the unibody attachment points.

My advice is to find an indy hitch installation company near you, to get bids from. They're generally pretty sharp if they can maintain an accessories / hitch business. I would not necessarily go with U-Haul for the install - before shopping the best indy hitch installers in your area.

My W126 had terrific unibody-attachment points utilized by the installer. It was a lot of years ago, that I had it custom installed by a indy hitch company in Council Bluffs, IA. All for less than $200.00 as I recall. It trailered over #2,000 worth of U-Haul and it's cargo for me. Worked flawlessly. I now wish I had taken several pictures of the W126 install - if I need to have the install duplicated elsewhere on another unibody MB.

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'06 E320 CDI
'17 Corvette Stingray Vert