Hi Norbert, sorry to read your review. This part has indeed been on a back-order at Evotech Performance, although I must add that the biggest part of that period was holiday. You ordered just before our holidays (as clearly advertised in the webshop at that moment), at which point this part was backorder at EP, and was shipped to you with the first shipment after the holidays; it took close to 6 weeks due to the holidays, but far from 2 months. I understand that it felt longer, but we'd hoped for more understanding for delays due to holidays.
The product description clearly states that this part is not designed for the W712, only for the 502 and 702 versions: 'Note: Carpuride are not included. This item is only compatible with the 502 and 702 systems'