# BCM (J519) Links => 73-pin connector - T73a Mitte => 46-pin connector -T46b Rechts => 73-pin connector - T73c #### 73-pin connector `T73a` 1 - Input (30) - front seat heating supply 2 - Output for heated driver seat -Z6- , Heated driver seat backrest -Z7- 3 - Output for tank filler flap locking motor -V155- 4 - Output for tank filler flap locking motor -V155- 5 - Output for heated front passenger seat -Z8- , Heated front passenger seat backrest -Z9- 6 - Output for central locking motor in rear right door, lock -V215- , motor for SAFE function of central locking in rear right door -V164- 7 - Output for motor for central locking system in right rear door, Lock -V215- (on vehicles with Low comfort system) \- Output for motor 2 for luggage compartment cover -V474- (on vehicles with High comfort system) 8 - 9 - Output for central locking motor in rear lid -V53- 10 - 11 - 12 - Input - terminal 31 13 - Output for terminal 15 voltage supply relay -J329- 14 - Output for - terminal 15 15 - LIN bus interior monitoring sensor -G273- , vehicle inclination sender -G384- 16 - CAN H, convenience 17 - CAN L, convenience 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - Input of fog light and rear fog light switch -E23- 30 - 31 - Input of interior button for central locking driver's side -E308- 32 - Input of rear lid handle release button -E234- 33 - Input of central locking lock unit, rear right -F223- 34 - 35 - Input of central locking lock unit, rear left -F222- 36 - Output for motor for SAFE function of central locking in rear left door -V163- 37 - Output for motor for SAFE function of central locking in rear right door -V164- 38 - 39 - 40 - 41 - 42 - LIN bus - Fan 1 for front left backrest -V512- , Fan 1 for front left seat cushion -V514- , Fan 1 for front right backrest -V516- , Fan 1 for front right seat cushion -V518- 43 - Input of light switch -E1- terminal 58 44 - Input of steering column electronics control unit -J527- - terminal 15 (for vehicles without entry and start authorisation) \- Input of interface for entry and start system -J965- terminal 15 (for vehicles with entry and start authorisation) 45 - 46 - Input of light switch -E1- terminal TFL 47 - Input of steering column electronics control unit -J527- - terminal 15 (for vehicles without entry and start authorisation) \- Input of interface for entry and start system -J965- terminal 15 (for vehicles with entry and start authorisation) 48 - Input of door contact switch, rear right -F11- 49 - Input of rear lid remote release switch -E188- 50 - Input of door contact switch, rear left -F10- 51 - Input of deactivation button of interior monitoring and vehicle inclination -E616- 52 - Input of rear lid lock unit -F256- terminal 31 53 - Input of rear lid lock unit -F256- terminal 31 54 - Input of steering column electronics control unit -J527- - terminal 86s (for vehicles without entry and start authorisation) \- Input of interface for entry and start system -J965- terminal 86s (for vehicles with entry and start authorisation) 55 - 56 - 57 - Output for bulb for high level brake light -M25- 58 - 59 - Output for number plate light, left -X4- , number plate light, right -X5- 60 - Output for turn signal bulb, rear left -M6- 61 - Output for rear window wiper motor -V12- 62 - Output for rear window wiper motor -V12- 63 - Input - terminal 31 64 - Output for reversing light bulb, right -M17- 65 - Output for tail light bulb, right -M2- 66 - Input (30) - light supply 67 - 68 - Output for central locking motor in rear left door, lock -V214- , motor for SAFE function of central locking in rear left door -V163- 69 - Output for motor for central locking system in left rear door, Lock -V214- (on vehicles with Low comfort system) \- Output for motor 1 for luggage compartment cover -V473- (on vehicles with High comfort system) 70 - 71 - Output for brake light bulb, left -M9- 72 - Output for rear fog light bulb, left -L46- 73 - Input - terminal 30 #### 46-pin connector `T46b` 1 - Output for dipped beam bulb, right -M31- 2 - Output for main beam bulb, right -M32- , control unit for left light control -J1018- 3 - Output for side light bulb, left -M1- 4 - Output for daytime driving light bulb, left -L174- , fog light bulb, right -L23- , static cornering light, right -M52- 5 - Output for fog light bulb, right -L23- 6 - Output for headlight range control motor, left -V48- , headlight range control motor, right -V49- terminal 31 7 - Output for windscreen and rear window washer pump -V59- 8 - Output for windscreen and rear window washer pump -V59- 9 - Output for heating resistance for injection nozzle, left -Z20- , heating resistance for injection nozzle, right -Z21- 10 - Output for side light bulb, left -M1- , fog light bulb, left -L22- , static cornering light, left -M51- 11 - Input of reversing light switch -F4- 12 - Input of brake lining/pad wear sender, front right -G35- 13 - Input of brake fluid level warning contact -F34- 14 - Input of bonnet contact switch -F266- , bonnet contact switch 2 -F329- 15 - 16 - Input of coolant shortage indicator sender -G32- 17 - 18 - 19 - Output for sender earth - terminal 31 20 - Output for turn signal bulb, front right -M7- 21 - Output for side light bulb, right -M3- , fog light bulb, right -L23- , static cornering light, right -M52- 22 - 23 - Output for cornering light and headlight range control, control unit -J745- 24 - Output for horn relay -J413- 25 - 26 - Output for heated windscreen relay -J47- 27 - Input of ambient temperature sensor -G17- 28 - Input of windscreen washer fluid level sender -G33- 29 - 30 - LIN bus - wiper motor control unit -J400- 31 - LIN Bus - signal horn for anti-theft alarm system -H8- 32 - Output for daytime driving light bulb, right -L175- , fog light bulb, left -L22- , static cornering light, left -M51- 33 - Output for headlight range control motor, left -V48- , headlight range control motor, right -V49- 34 - 35 - Output for side light bulb, right -M3- 36 - Output for turn signal bulb, front left -M5- 37 - 38 - 39 - Output for main beam bulb, left -M30- , control unit for right light control -J1023- 40 - 41 - 42 - 43 - 44 - Output for headlight range control motor, left -V48- , headlight range control motor, right -V49- supply 45 - Output for fog light bulb, left -L22- 46 - Output for headlight washer system pump -V11- #### 73-pin connector `T73c` 1 - Input (30) - light supply 2 - 3 Video input of rear view camera (Low) 4 - 5 - Output for dipped beam bulb, left -M29- 6 - 7 - 8 - Output for brake light bulb, right -M10- 9 - 10 - Output for tail light bulb, left -M4- 11 - Output for reversing light bulb, left -M16- , Automatic anti-dazzle interior mirror -Y7- 12 - Output for interior light - terminal 30g 13 - 14 - Input of interface for entry and start authorisation -J965- (wake up wire) 15 - Input of light switch -E1- terminal 56 16 - Input of light switch -E1- (AFL) 17 - 18 - 19 - 20 - 21 - Output for Warning light for operational profile selection -K280- 22 - 23 - 24 - Output for heated rear window relay -J9- 25 - 26 - 27 - 28 - Input of humidity sender -G355- , air humidity, rain and light detector sensor -G823- 29 - LIN bus Light for front left door contour lighting -L251- , Light for front right door contour lighting -L252- , Light for rear left door contour lighting -L253- , Light for rear right door contour lighting -L254- 30 - 31 - Output for turn signal bulb, rear right -M8- 32 - Output for deactivation warning light of interior monitoring and vehicle inclination -K248- 33 - 34 - Input of exterior mirror heating button -E735- 35 - 36 - 37 - 38 - 39 - 40 - Input of temperature sensor for front passenger seat -G60- 41 - 42 - Input of hazard warning lights button -E229- 43 - Input of temperature sensor for driver seat -G59- 44 - 45 - Input of off-road mode switch -E207- 46 - Output for heated front seat control unit -J786- 47 - Output for control light for interior locking warning light, driver side -K174- 48 - Output for hazard warning light system warning light -K6- , bulb for button illumination -L76- 49 - 50 - Output for off-road mode warning light -K330- 51 - Output for start/stop operation warning light -K259- 52 - 53 - 54 - 55 - 56 - Output for sender earth - terminal 31 57 - 58 - Input of brake light switch -F- 59 - 60 - Input of start/stop operation button -E693- 61 - 62 - Output - terminal 58d 63 - Input - terminal 31 64 - 65 - 66 - 67 - Output for interior light (Klemme 58d), Deactivation button of interior monitoring and vehicle inclination -E616- - Terminal 31 (door contact switch) 68 - 69 - 70 - 71 - 72 - Output for left footwell light -W9- , right footwell light -W10- , rear left footwell light -W45- , rear right footwell light -W46- 73 - Input - terminal 30