This is quite handy to find and apply coupon codes on different sites instead of manually hunting for them. I just started so not fully tested but I just placed order on Eurocarparts for a set of filters for A6. While the ECP always have some deals and discount codes boldly displayed at the top the current code is PAYDAY50 which gives up to 50% off but for the filters only 45%. Honey automatically found working code VCL52 which gave me 52% discount.
Here is my referral link
joinhoney.com/ref/n5hwnyo , it's supposed to give me some points but I am not sure what I can do with them. Or you can just go to
https://www.joinhoney.com if you don't want to use referral link.