Hi all. I am having Bluetooth problems on my BMW f11 520d SE Touring. I want to replace the TCU. The unit details are contained in the photo. My question is what unit number should I be matching on the replacement. Is it the BMW number (BMW 84.10-9 238 245 - 01) and/or date (24/08/2010) or the Model Number BE B011. 100 991-10? I have found several replacments which come close on BMW number and date but it is impossible to come close on matching 100%. Any information would be mush appreciated!