Legend of wiring diagram for upper control panel - PE54.21-P-2119-60SAA
Model 221.0/1 control unit N72/1
| Code | Designation | Coordinates |
|---|---|---|
| A0 | Color code key | 40L |
| A40/9 | Front central operating unit | 26L |
| A40/9s3 | Hazard warning system button | 27L |
| A40/9s10 | Freely programmable button | 28L |
| A40/9x1 | Front central operating unit connector | 24H |
| A70/1 | Analog clock | 23L |
| E13/1 | Glove compartment light | 6L |
| E17/15 | Right front footwell lamp | 8L |
| E17/16 | Left front footwell lamp | 10L |
| E43/1 | Ambiance illumination LED 1 | 31L |
| E43/2 | Ambiance illumination LED 2 | 32L |
| E43/3 | Ambiance illumination LED 3 | 34L |
| N10/1 | Front SAM control unit with fuse and relay module | 2L |
| N72/1 | Upper control panel control unit | 4A |
| N72/1 | Upper control panel control unit | 12A |
| N72/1 | Upper control panel control unit | 20A |
| N72/1 | Upper control panel control unit | 28A |
| N72/1 | Upper control panel control unit | 34A |
| N72/1e2 | ATA [EDW] function indicator | 25C |
| N72/1s30 | STH/ZUH/residual heat button | 21C |
| N72/1s33 | Left automatic air conditioning button | 15C |
| N72/1s34 | Left temperature selection button | 16C |
| N72/1s35 | Left blower button | 17C |
| N72/1s36 | Defrost/heated windshield button | 18C |
| N72/1s37 | Air recirculation button | 19C |
| N72/1s38 | OFF/residual heat button | 20C |
| N72/1s39 | Heated rear window button | 22C |
| N72/1s40 | Right blower button | 22C |
| N72/1s41 | Right temperature selection button | 23C |
| N72/1s42 | Right automatic air conditioning button | 24C |
| S1 | Exterior lamp switch | 20L |
| S1e1 | Front fog lamps indicator lamp | 20K |
| S1e2 | Rear fog lamp indicator lamp | 19J |
| S1e3 | Standing lamps indicator lamp | 20J |
| S1s1 | HCS [SRA] switch | 20K |
| S1s9 | Night vision assist button | 19K |
| S6/2 | Cockpit switch group | 15L |
| S6/2e1 | Automatic child seat recognition airbag OFF indicator lamp | 16H |
| S6/2r1 | Switch and controls illumination/Night View Assist display brightness control | 14K |
| S6/2r2 | COMAND display brightness control | 16K |
| S6/2s10 | Level adjustment switch | 16H |
| S6/2s11 | ESP OFF switch | 16J |
| S6/2s12 | PTS OFF switch | 16J |
| S6/2s13 | COMAND display swivel left switch | 14K |
| S6/2s14 | COMAND display swivel right switch | 16K |
| S17/9 | Glove compartment lamp switch | 5L |
| U12 | Valid for left-hand drive vehicles | 2E |
| U12 | Valid for left-hand drive vehicles | 7J |
| U13 | Valid for right-hand drive vehicles | 3F |
| U13 | Valid for right-hand drive vehicles | 7J |
| U884 | Valid for ambiance illumination | 30E |
| W15 | Power ground (electronics) | 3H |
| W15 | Power ground (electronics) | 7L |
| W34 | Ground (left footwell) | 3H |
| W34 | Ground (left footwell) | 7L |
| X18 | Cockpit wiring harness and FFS [RBA] connector | 24F |
| X29/1 | Glove compartment lamp connector | 4H |
| X30/34 | Interior CAN/cockpit voltage distributor connector | 12L |
| X99/9 | Separation point 9 | 30H |
| X99/9 | Separation point 9 | 32H |
| X99/9 | Separation point 9 | 34H |
| Z6/30 | Circuit 31 connector sleeve | 7E |
| Z68/10 | OBD LIN bus ground connector sleeve | 18G |
| Z68/11 | OBD LIN bus positive connector sleeve | 19G |
| Z68/12 | OBD LIN bus data connector sleeve | 21G |