Remove/Install Brake Booster - AR43.10-P-0350MFB
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Model 118.###2#, 177.###2#, 247.###2#
Shown on model 177 with engine 260
| Risk of fire due to ignition of R1234yf refrigerant on hot components. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with escaped R1234yf refrigerant and when working on pressurized parts. Risk of explosion due to formation of ignitable refrigerant/air mixtures | Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated. | AS83.00-Z-0007-01A | |
| 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 118.### 2#, 177.### 2#, 247.### 2# 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 poisoning caused by inhaling overheated refrigerant vapors from an air conditioning system containing R134a. Risk of injury to skin and eyes caused by contact with liquid R134a refrigerant and when working on pressurized parts | Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated. | AS83.00-Z-0006-01A | |
| 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 | |
| Notice | Information on preventing damage to electronic components due to electrostatic discharge | AH54.00-P-0001-01A | |
| Notice | Notes on avoiding damage through contamination and foreign objects | AH00.00-P-5000-01A | |
| Notice | Notes on self-locking nuts and bolts | AH00.00-P-0001-01KOA | |
| Notice | 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 118.### 2#, 177.### 2#, 247.### 2# with engine 282 with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) | AH00.00-Z-0300-01A |
| Notice | Brake fluid notes | AH42.50-P-0001-01A | |
| Notice | Notes on repairs to brake system | AH42.00-P-0003-01A | |
| Notice | Notes on externally invisible brake fluid loss | AH42.10-P-9406-02A | |
| Notes on safety-relevant components | AH00.00-Z-0019-01A | ||
| Remove/install | |||
| 1 | Reduce vacuum in brake booster (1) by depressing brake pedal several times. | ||
| 2 | Clean area around brake fluid reservoir (2) thoroughly. | Assembly cleaner | *BR00.45-Z-1028-04A |
| 3 | Remove cap. | ||
| 4 | Remove sieve from brake fluid reservoir (2). | ||
| 5 | Extract brake fluid from brake fluid reservoir (2). | ||
| 6 | Install sieve into brake fluid reservoir (2). | ||
| 7 | Attach cap. | ||
| 8.1 | Remove the catalytic converter. | Model 118.### 2#, 177.### 2#, 247.### 2# with engine 282 | |
| Model 118, 177, 247 with engine 282.8 | AR49.20-P-0100MFA | ||
| Model 118, 177, 247 with engine 282.9 | AR49.20-P-0100MFD | ||
| 8.2 | Remove exhaust gas aftertreatment unit. | Model 118.### 2#, 177.### 2#, 247.### 2# with engine 608 | |
| AR49.20-P-1500MFE | |||
| 8.3 | Remove engine with transmission. | Model 118.### 2#, 177.### 2#, 247.### 2# with engine 139, 260, 654 | |
| Model 118, 177, 247 with engine 139 with transmission 724.1 | AR01.10-P-2401MFG | ||
| Model 118, 177, 247 with engine 260 with transmission 724.1 | AR01.10-P-2401MFJ | ||
| Model 118, 177, 247 with engine 260 with transmission 724.0 | AR01.10-P-2401MFC | ||
| Model 118, 177, 247 with engine 654 with transmission 711.63 | AR01.10-P-2401MFS | ||
| Model 118, 177, 247 with engine 654 with transmission 724.1 | AR01.10-P-2401MFF | ||
| 9 | Remove brake lines (6) from hydraulic unit (7). | AR42.40-P-0816MFA | |
| 10 | Remove refrigerant lines from expansion valve. | AR83.30-P-5520MFA | |
| 11 | Remove holders for power electronics. | Model 118.### 2#, 177.### 2#, 247.### 2# with engine 282 with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) |
|
| AR08.00-P-0005MFH | |||
| 12 | Remove right engine mount. | Model 118.### 2#, 177.### 2#, 247.### 2# | |
| Model 118, 177, 247 with engine 282 | AR22.10-P-1102MFD | ||
| Model 118, 177, 247 with engine 608 | AR22.10-P-1102MFE | ||
| 13 | Release and disconnect electrical connector from brake vacuum sensor (B150). | ||
| 14 | Cover painted surfaces in the repair area. | Protect painted surfaces from brake fluid. Otherwise damage will be caused by escaping brake fluid. |
|
| 15 | Clean master brake cylinder (5) in area of connections of brake lines (6). | Thoroughly clean area around connecting points before opening the brake system. Otherwise minute dirt particles in the hydraulic components result in malfunctions and total failure of the brake system. |
|
Do not use any compressed air for cleaning when the brake system is open. |
|||
| Assembly cleaner | *BR00.45-Z-1028-04A | ||
| 16 | Remove brake lines (6) from master brake cylinder (5). | ||
| Note on calculation of tightening torque when using insertion or socket tools with various effective lengths | AH00.00-P-0015-01CW | ||
Seal connections immediately. Otherwise damage can be caused by escaping brake fluid. |
|||
| *BA42.10-P-1002-04Q | |||
| Fig 4 | |||
| Fig 2 | |||
| 17 | Move brake lines (6) far enough into holders to free up the installation space of the brake booster (1). | Do not deform brake lines (6). Otherwise failure can occur to the brake system. |
|
| 18 | Detach vacuum line (3) from brake booster (1). | ||
| Fig 2 | |||
| 19 | Check seal of vacuum line (3) in brake booster (1) for damage. | If damage is found, ↓ Replace seal of vacuum line (3) in brake booster (1). |
|
| 20 | Release and disconnect electrical connector (4). | ||
| 21 | Remove electric line from brake booster (1). | Fig 3 | |
| 22 | Remove lower trim for instrument panel on driver's side. | AR68.10-P-1501MFA | |
| 23 | Remove screw (9). | *BA43.10-P-1002-01L | |
| 24 | Remove nuts (8). | *BA43.10-P-1001-01L | |
| 25 | Remove brake booster (1) forward. | Do not damage boot when removing/installing brake booster (1). Otherwise the brake booster (1) will fail. |
|
| 26 | Remove master brake cylinder (5) with brake fluid reservoir (2) from brake booster (1). | When replacing brake booster (1). | |
| AR42.10-P-0300MFA | |||
| 27 | Remove brake vacuum sensor (B150) from brake booster (1). | When replacing brake booster (1). | |
| 28 | Install in the reverse order. | ||
| Check | |||
| 29 | Perform brake test on roller brake test stand. | ||
| Brake test | AP42.00-P-4290BA |
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 |
PNEUMATIC BRAKE BOOSTER
| Number | Designation | Model 118 | Model 177, 243, 247 | ||
|---|---|---|---|---|---|
| BA43.10-P-1001-01L | Nut, brake booster to front end | M8 | Nm | 22 | 22 |
PNEUMATIC BRAKE BOOSTER
| Number | Designation | Model 118 | Model 177, 243, 247 | |
|---|---|---|---|---|
| BA43.10-P-1002-01L | Bolt, brake pedal brake booster retaining bolt | Nm | 22 | 22 |
REPAIR MATERIALS
| Number | Designation | Order number |
|---|---|---|
| BR00.45-Z-1028-04A | Assembly cleaner | A 000 986 56 01 |