ABS/ABD or ABS/ETS systems
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| A2 | Hydromodulator with ECU | 4A |
| 12A | ||
| A2k1 | Valve relay | 3A |
| A2k2 | Engine relay | 7A |
| A2m1 | Brake fluid return pump | 9A |
| A2y1 | Left brake inlet valve | |
| front wheel | 10A | |
| A2y2 | Brake release valve left | |
| front wheel | 10A | |
| A2y3 | Right brake inlet valve | |
| front wheel | 10A | |
| A2y4 | Brake release valve right | |
| front wheel | 11A | |
| A2y5 | Left brake inlet valve | |
| rear wheel | 11A | |
| A2y6 | Brake release valve left | |
| rear wheel | 12A | |
| A2y7 | Right brake inlet valve | |
| rear wheel | 12A | |
| A2y8 | Brake release valve right | |
| rear wheel | 12A | |
| A2y9 | Left rear shift valve | 13A |
| A2y10 | Inlet valve left rear | 13A |
| A2y11 | Switch valve right rear | 14A |
| A2y12 | Inlet valve right rear | 14A |
| A12 | Central mounting block | 19L |
| A12F5 | Brake light and nozzle heater fuse | |
| windshield washer (socket 5) | 19K | |
| B18 | 4-pin brake light switch | |
| (cruise control) | 14L | |
| B19 | 2-pin brake light switch | 17L |
| B79 | Left Front Wheel Speed Sensor | 8L |
| B80 | Right Front Wheel Speed Sensor | 9L |
| B81 | Left rear wheel speed sensor | 11L |
| B82 | Right rear wheel speed sensor | 12L |
| F5 | ABS system fuse | 2J |
| F6 | ABS system fuse | 2J |
| F7 | ABS system fuse | 1J |
| H66 | ABS warning light | 4L |
| H71 | ABD system warning light | 6L |
| J8 | Brake signal output | 14H |
| J16 | Output "30" | 1L |
| J31 | Terminal "15" protected by fuse | 3L |
| J88 | Right Front Speed Sensor Output | |
| wheels | 9J | |
| J105 | Output "15" | 5H |
| J130 | Output of connection with the "ground" of the frequency sensor | |
| rotation of the right front wheel | 10J | |
| J131 | Output of connection with the "ground" of the frequency sensor | |
| rotation of the left front wheel | 8J | |
| J132 | Output of connection with the "ground" of the frequency sensor | |
| rotation of the right rear wheel | 12J | |
| J133 | Left Front Speed Sensor Output | |
| wheels | 8J | |
| J134 | Left rear wheel speed sensor output | 11J |
| J135 | Output of connection with the "ground" of the frequency sensor | |
| rotation of the left rear wheel | 10J | |
| J136 | Right rear speed sensor output | |
| wheels | 13J | |
| J277 | Output "15" | 16L |
| P11 | 14-pin diagnostic connector | 7L |
| W7 | Ground connection in the engine compartment | 6H |
| W27 | Connection to the ground of the ABS/ABD system | 5H, 19J |
| X79 | Frame and body wiring harness connector | 3J, 6J |
[Text republished from the website mercedesman]