Early S211 with Isofix - Information Needed

[E55BOF]

Or ideally, a couple of pictures. My newly-acquired '03 S211 doesn't have Isofix fittings, but I understand/believe/hope that they all had the appropriate drillings and welded nuts. I've bought the brackets - NLA from MB, but I found some on the net - to fit behind/under the l/h rear seat, but I can't seem to find any soft spots in the felt trim under the seat that would indicate a hole beneath.

Does anyone have an early S211 with Isofix fittings for the l/h rear seat position, and if so, could they be so kind as to post a couple of pics of the area, so I can see whereabouts to start? If anyone has fitting instructions, that would be a great help too.

 

[mersum1es]

Mercedes-Benz W211 E-Class Isofix retrofit

 

[E55BOF]

That's exactly what I wanted; thank you very much