When working on my 300D, I looked for patches for repair of jack points, but could not find any.

Recently, on BW W210 site a member posted a link to an eBay Germany vendor who has jack point patch panels for several Benzes including the W123:

Wagenheberaufnahme

(use Google Chrome for automatic translation)

EUR 84,00 per set (consisting of 4 pieces)

Would have to ask if they ship outside Europe.

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Graham
85 300D,72 350SL, 98 E320, Outback 2.5