ALLOCATION PR-NO./BRAKES
The brake system installed in a vehicle is documented on the vehicle data sticker via the relevant PR number.
Scheme 45
Scheme 45: ALLOCATION PR-NO./BRAKES
- Arrow 2 - Rear wheel brake
- Arrow 3 - Front wheel brake
The vehicle data label can be found in the spare wheel well as well as in the Maintenance booklet.
Using the PR-No. the correct combination of brake caliper/brake rotor/brake pad can be determined.
BRAKES
| Brake System |
|---|
| Dual-circuit brake system with diagonal distribution, anti-lock brake system (ABS) with electronic brake pressure distribution (EBD). Depending on equipment and construction, also with electronic differential lock (EDL), anti-slip regulation (ASR), electronic stability program (ESP) |
| Brake Master Cylinder | Diameter in mm | 22.2 |
| Brake Booster | Diameter in inches | 10 |
| Function | Pneumatic |
| Assist factor | I = | 5 |
| Front Axle |
|---|
| Brake PR number | | 1ZA | 1ZC / 1ZM | 1ZD / 1LJ | 1ZE | 1ZF | 1ZK / 1LK | 1ZP |
| Front brake caliper | | FN3 | FN3 | FN3 | FN3 | FSIII | FNR-G-57 | FN3 |
| Pistons | Diameter mm | 54 | 54 | 54 | 54 | 54 | 57 | 54 |
| Front brake disc | Diameter mm | 312 | 312 | 312 | 288 | 280 | 345 | 288 |
| Brake disc thickness, ventilated | Mm | 25 | 25 | 25 | 25 | 22 | 30 | 25 |
| Brake disc wear limit | Mm | 22 | 22 | 22 | 22 | 19 | 27 | 22 |
| Pad thickness, new (not including backing plate) | Mm | 14.8 | 14 | 14 | 14 | 14 | 14.8 | 14 |
| Brake pad wear limit (not including backing plate) | Mm | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Rear Wheel Brake, Front-Wheel Drive | |
|---|
| Brake PR number | | 1KD | 1KE, 1KF | 1KQ | 1KU | 1KZ, 1KJ | 1KS |
| Rear brake caliper | | C 38 | CII 41HR | C 38 | CII 38HR | CII 38HR | CII 41H R |
| Pistons | Diameter mm | 38 | 41 | 38 | 38 | 38 | 38 |
| Rear brake disc | Diameter mm | 255 | 260 | 255 | 286 | 286 | 272 |
| Brake disc thickness | Mm | 10 | 12 | 10 | 12 | 12 | 10 |
| Brake disc wear limit | Mm | 8 | 10 | 8 | 10 | 10 | 7 |
| Pad thickness, new (not including backing plate) | Mm | 10.96 | 10.96 | 10.96 | 10.96 | 10.96 | 11 |
| Brake pad wear limit (not including backing plate) | Mm | 2 | 2 | 2 | 2 | 2 | 2 |
| Rear Wheel Brake, All-Wheel Drive |
|---|
| Brake caliper PR-No. | | 1KF | 1KJ | 1KU | 1KW | 2EA | 1KS |
| Rear brake caliper | | CII 41HR | CII 41HR | CII 41HR | CII 41HR | CII 41HR | CII 41HR |
| Pistons | Diameter mm | 41 | 41 | 41 | 41 | 41 | 38 |
| Rear brake disc | Diameter mm | 260 | 286 | 286 | 310 | 310 | 272 |
| Brake disc thickness, not ventilated | Mm | 12 | 12 | 12 | 22 | 22 | 10 |
| Brake disc wear limit | Mm | 9 | 9 | 9 | 19 | 19 | 7 |
| Pad thickness, new (not including backing plate) | Mm | 10.96 | 10.96 | 10.96 | 10.96 | 10.96 | 11 |
| Brake pad wear limit (not including backing plate) | Mm | 2 | 2 | 2 | 2 | 2 | 2 |
