Hi guys, I’ve had a nox sensor replaced on another Mercedes years ago it was a 4 month wait for a geniuine one, I can get a genuine one now but it’s a 3 week wait and £270+ vat or I can get an eBay jobby for £100 and it come in a day, has anyone used an after market one? Can they point me in the right direction? Best brand etc, seller, or would you steer away? Cheers guys 
