C55 Rear Door Blinds..?

[unit504]

Been trying to find some information regarding rear door blinds on the C55
I see there is one on eBay for sale which has them and also the rear window blind... is the rear door blinds an option from factory..? or possible a mod..? Any info would be great

 

[d w124]

Check on ebay.de,they do come up from time to time
I might be wrong but I don't think the ones on the pictures are a mercedes item

 

[KillerHERTZ]

Yep, those top retaining clips aren't OEM