Remove/Install Brake Master Cylinder - AR42.10-P-0300MFA
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Model 118, 177, 247
MODIFICATION NOTES
| 15.01.2020 | Document completely revised. |
Fig 1: Brake Master Cylinder Components Location - Model 118 (Shown On Model 177.0 With Engine 282 Except Code ME08)
Shown on model 177.0 with engine 282 except code ME08 (Hybrid drive 755-84 KW VARIANT (INCLUDING PLUGIN))
Shown on model 177.0 with engine 282 with code ME08 (Hybrid drive 75-84 KW VARIANT (INCLUDING PLUGIN))
| Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC) | Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines. Model 177, 247 with engine 282 with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) |
AS00.00-Z-0035-01A | |
| Risk of accident when commissioning the vehicle due to a lack of braking effect when the service brake is operated for the first time after repair work. | Before starting the engine, actuate brake pedal several times until pressure is built up and maintained in the brake system. | AS42.50-Z-0002-01A | |
| Risk of injury . Skin or eye injuries may result when handling hot or glowing objects. | Wear protective gloves, protective clothing and safety glasses, if necessary. | AS00.00-Z-0002-01A | |
| Risk of injury caused by scraping or cutting body parts on sharp vehicle parts | Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels. |
AS00.00-Z-0017-01A | |
| Risk of poisoning from swallowing brake fluid. Risk of injury from skin and eye contact with brake fluid | Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid. | AS42.50-Z-0001-01A | |
| Topical note | General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment | Model 177, 247 with engine 282 with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) | AH00.00-Z-0300-01A |
| Topical note | Notes on repairs to brake system | AH42.00-P-0003-01A | |
| Topical note | Brake fluid notes | AH42.50-P-0001-01A | |
| Notes on safety-relevant components | AH00.00-Z-0019-01A | ||
| Remove | |||
| 1 | Reduce vacuum in brake booster by depressing brake pedal several times. | ||
| 2 | Remove battery carrier. | AR54.10-P-0028MFA | |
| 3.1 | Remove holders for power electronics. | Model 177, 247 with engine 282 with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) | |
| AR08.00-P-0005MFH | |||
| 3.2 | Remove heat shield for firewall until the master brake cylinder (6) is accessible. | Model 118 with engine 282 Model 118, 177, 247 with engine 139 Model 118, 177, 247 with engine 260 Model 118, 177, 247 with engine 608 Model 118, 177, 247 with engine 654 Model 177, 247 with engine 282 except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) |
|
| Model 118, 177, 247 with engine 260 | AR49.10-P-0001MFC | ||
| Model 118 with engine 282Model 177, 247 with engine 282 except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) |
AR49.10-P-0001MFD | ||
| Model 118, 177, 247 with engine 608 | AR49.10-P-0001MFE | ||
| Model 118, 177, 247 with engine 654 | AR49.10-P-0001MFF | ||
| Model 118, 177, 247 with engine 139 | AR49.10-P-0001MFG | ||
| 4 | Extract brake fluid from brake fluid reservoir (1). | ||
| 5 | Release and disconnect electrical connector (7). | ||
| 6 | Unclip electric line (4) from master brake cylinder (6). | Fig 5 | |
| 7 | Mark brake lines (2) relative to master brake cylinder (6). | ||
| 8 | Remove brake lines (2) from master brake cylinder (6). | Collect brake fluid which runs out with an absorbent rag. The paint will be damaged otherwise. |
|
| Fig 4 | |||
| Fig 2 | |||
| 9 | Seal exposed connections using suitable plugs. | Fig 3 | |
| 10 | Unclip brake lines (2) from bracket and press lightly to one side. | Do not kink or crush brake lines (2). Otherwise damage will occur. |
|
| 11 | Remove nuts (5). | ||
| 12 | Remove master brake cylinder (6) with brake fluid reservoir (1). | ||
| 13 | Detach brake fluid reservoir (1) from master brake cylinder (6). | When replacing the master brake cylinder (6). | |
| AR42.10-P-0308MFA | |||
| Install | |||
| 14 | Attach brake fluid reservoir (1) to master brake cylinder (6). | When replacing the master brake cylinder (6). | |
| AR42.10-P-0308MFA | |||
| 15 | Position master brake cylinder (6) with brake fluid reservoir (1) on brake booster. | ||
| 16 | Install nuts (5). | *BA42.10-P-1001-05G | |
| 17 | Remove stop plugs from connections. | Fig 3 | |
| 18 | Clip brake lines (2) into holder and position on master brake cylinder (6). | ||
| 19 | Attach brake lines (2) to master brake cylinder (6). | ||
| Note on calculation of tightening torque when using insertion or socket tools with various effective lengths | AH00.00-P-0015-01CW | ||
| *BA42.10-P-1002-04Q | |||
| Fig 4 | |||
| Fig 2 | |||
| 20 | Clip electric line (4) onto master brake cylinder (6). | ||
| 21 | Connect and lock electrical connector (7). | ||
| 22.1 | Attach heat shield for firewall. | Model 118 with engine 282 Model 118, 177, 247 with engine 139 Model 118, 177, 247 with engine 260 Model 118, 177, 247 with engine 608 Model 118, 177, 247 with engine 654 Model 177, 247 with engine 282 except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) |
|
| Model 118, 177, 247 with engine 260 | AR49.10-P-0001MFC | ||
| Model 118 with engine 282 Model 177, 247 with engine 282 except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) |
AR49.10-P-0001MFD | ||
| Model 118, 177, 247 with engine 608 | AR49.10-P-0001MFE | ||
| Model 118, 177, 247 with engine 654 | AR49.10-P-0001MFF | ||
| Model 118, 177, 247 with engine 139 | AR49.10-P-0001MFG | ||
| 22.2 | Install holders of power electronics. | Model 177, 247 with engine 282 with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) |
|
| AR08.00-P-0005MFH | |||
| 23 | Install battery carrier. | AR54.10-P-0028MFA | |
| 24 | Bleed brake system. | AR42.10-P-0010MFA | |
| Check | |||
| 25 | Perform brake test on test stand. | ||
| AP42.00-P-4290BA |
MASTER BRAKE CYLINDER
| Number | Designation | Model 118 | Model 177 | |
|---|---|---|---|---|
| BA42.10-P-1001-05G | Nut, master brake cylinder to brake unit | Nm | 23 | 23 |
MASTER BRAKE CYLINDER
| Number | Designation | Model 247 | |
|---|---|---|---|
| BA42.10-P-1001-05G | Nut, master brake cylinder to brake unit | Nm | 23 |
BRAKE LINES
| Number | Designation | Model 118 | Model 177 | |
|---|---|---|---|---|
| BA42.10-P-1002-04Q | Retaining screw, brake line to master brake cylinder | Nm | 16 | 16 |
BRAKE LINES
| Number | Designation | Model 247 | |
|---|---|---|---|
| BA42.10-P-1002-04Q | Retaining screw, brake line to master brake cylinder | Nm | 16 |