00 - General, Technical Data: Brakes
Vehicles with front and rear disc brakes
| Brake system |
| Dual-circuit brake system with diagonal distribution. ABS Bosch 5.7 or ABS Bosch 8.0 with Electronic Brake Distribution (EBD)/ESP Brake booster operating with manifold vacuum or vacuum pump |
| Brake master cylinder |
Dia. mm |
25.4 |
26.99 |
| Brake booster, vacuum |
Dia. in inches |
8" and 9" tandem |
8" and 9" tandem/Dual Rate |
| Assist factor |
i |
5.5 |
5.5/12 |
| Front brakes |
|
| Brake caliper |
|
C 54 |
FN 3 |
FN 3 |
FNR-G 60 |
FNR-G 60 |
Brembo |
| Disc size (inches) |
|
15 |
15 |
16 |
16 |
17 |
18 |
| Production relevant no. |
Pr.- No. |
1LZ |
1LB/1LE |
1LT/1LF |
1LA/1LD |
1LJ |
1LP |
| Front brake caliper, piston diameter |
mm |
54 |
57 |
57 |
60 |
60 |
28/32 |
| Front brake disc |
mm |
280 |
288 |
312 |
320 |
345 |
365 |
| Brake disc thickness, internally ventilated; |
mm |
22 |
25 |
25 |
30 |
30 |
34 |
| Brake disc wear limit |
mm |
20 |
23 |
23 |
28 |
28 |
32 |
| Pad thickness, with backing plate and dampening sheet |
mm |
19.3 |
20.3 |
20.3 |
20.3 |
20.3 |
- |
Brake discs
NOTE:
- Hairline cracks on brake disc friction surfaces are often observed during brake repairs. Hairline cracks up to 10 mm long are not a technical flaw and are not cause for brake disc replacement.
- Brake discs with friction surfaces that have worn through should be replaced.
| Rear brakes |
| Rear brake caliper |
|
C38 |
C38 |
C41 |
C43 |
C43 |
| Disc size (inches) |
|
15 |
16 |
16 |
16 |
18 |
| Production relevant no. |
Pr.- No. |
1KD |
1KP |
1KW |
1KE |
1KY |
| Rear brake caliper, piston diameter |
mm |
38 |
38 |
41 |
43 |
43 |
| Brake disc |
mm |
245 |
255 |
288 |
300 |
335 |
| Brake disc thickness |
mm |
10 |
12 |
12 |
22 |
22 |
| Brake disc wear limit |
mm |
8 |
10 |
10 |
20 |
20 |
| Brake pad, thickness with backing plate |
mm |
16 |
16 |
16 |
17.5 |
- |
| Brake pad wear limit with backing plate |
mm |
7 |
7 |
7 |
8 |
- |