Just an update this worked! its 3/8" / 9.5mm I.D., not a hard job, just hard to find hose these days. But I got it in and the car rides much better now!
Good luck to you guys

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Current Fleet:

‘97 S320 Black LWB - Sold
‘85 300TD - Sold #wagonlifeordie
‘79 300SD - Sold
‘84 300D Anthracite Grey Metallic - Sold
‘80 300D 100k mi - Sold
‘77 280E Gold - Sold