Legend of electrical function schematic for on-board electrical system control - PE54.10-P-2052-60SAA
Model 221.0/1 as of model year 09/YoM 08
| Code | Designation | Coordinates |
|---|---|---|
| A6n1 | STH or HB control unit | 21B |
| A8/1 | Transmitter key | 10C |
| A40/3 | COMAND controller unit | 29J |
| A76 | Left front reversible emergency tensioning retractor | 7A |
| A76/1 | Right front reversible emergency tensioning retractor | 7B |
| B95 | Battery sensor | 13K |
| Code 220 | PARKTRONIC (PTS) | 17A |
| Code 228 | Stationary heater | 20A |
| Code 230 | Exclusive parking assist | 17A |
| Code 443 | Heated steering wheel | 2A |
| Code 550 | Trailer hitch | 19J |
| F32/4k2 | Quiescent current cutout relay | 12E |
| G2 | Generator | 2E |
| N3/9 | CDI control unit | 2J |
| N3/10 | ME-SFI [ME] control unit | 4J |
| N3/10 | ME-SFI [ME] control unit | 7J |
| N10/1 | Front SAM control unit with fuse and relay module | 15E |
| N10/2 | Rear SAM control unit with fuse and relay module | 23J |
| N22/1 | AAC [KLA] control unit | 29A |
| N26/14 | Special vehicle multifunction control module (SVMCM) | 18J |
| N28/1 | Trailer recognition control unit | 20K |
| N32/1 | Left front seat control unit | 26A |
| N32/2 | Right front seat control unit | 26A |
| N62 | PTS control unit | 18B |
| N69/1 | Door control module front left | 23A |
| N69/2 | Door control module front right | 23A |
| N70 | Overhead control panel control unit | 26J |
| N73 | EIS [EZS] control unit | 9B |
| N80 | Steering column module | 4B |
| N93 | Central gateway control unit | 9F |
| U52 | Valid for Japan | 28J |
| U54 | Valid for all except Japan | 28J |
| U74 | Valid for diesel engines | 1J |
| U75 | Valid for gasoline engines | 3J |
| CAN B | Interior CAN | 12F |
| CAN B | Interior CAN | 13B |
| CAN B | Interior CAN | 19F |
| CAN B | Interior CAN | 28F |
| CAN-E | Chassis CAN | 4D |
| CAN-E | Chassis CAN | 6G |
| CAN-E | Chassis CAN | 7D |
| CAN-E | Chassis CAN | 9D |
| LIN B7 | On-board electrical system LIN | 12J |
| LIN C1 | Drive train LIN | 2H |
| 1 | Circuit 15, status | 16E |
| 2 | Circuit 61, status | 2H |
| 2 | Circuit 61, status | 8G |
| 2 | Circuit 61, status | 14G |
| 3 | Engine speed, signal | 7G |
| 3 | Engine speed, signal | 14G |
| 4 | Battery sensor, signal | 14H |
| 5 | On-board electrical system limp-home mode, signal | 5H |
| 5 | On-board electrical system limp-home mode, signal | 10G |
| 6 | Alternator operating rate, signal | 7G |
| 6 | Alternator operating rate, signal | 13G |
| 7 | Alternator, request | 5H |
| 7 | Alternator, request | 11G |
| 8 | Alternator, actuation | 2G |
| 9 | Consumer shutoff, request | 4D |
| 9 | Consumer shutoff, request | 5H |
| 9 | Consumer shutoff, request | 7D |
| 9 | Consumer shutoff, request | 10D |
| 9 | Consumer shutoff, request | 11G |
| 9 | Consumer shutoff, request | 19D |
| 9 | Consumer shutoff, request | 19H |
| 9 | Consumer shutoff, request | 21D |
| 9 | Consumer shutoff, request | 21H |
| 9 | Consumer shutoff, request | 24D |
| 9 | Consumer shutoff, request | 24H |
| 9 | Consumer shutoff, request | 27D |
| 9 | Consumer shutoff, request | 27H |
| 9 | Consumer shutoff, request | 30D |
| 9 | Consumer shutoff, request | 30H |
| 10 | Idle speed increase, request | 5G |
| 10 | Idle speed increase, request | 12G |
| 11 | Quiescent current cutout relay, actuation | 12E |