Remove/Install Integrated Starter Alternator Control Unit - AR15.40-P-0004SB
Engine 256.9 in model 223
except code ME10 (Hybrid vehicle (plug-in, PHEV))
MODIFICATION NOTES
| 07.05.2019 | Phase bolt on inverter | BA15.40-P-1008-02MRT | |
| 31.03.2020 | Screw, holder for wiring harness (integrated starter alternator/refrigerant compressor/transmission) to crankcase | BA15.40-P-1014-02MRT | |
| 04.07.2023 | Bolt, terminal box cover to starter-alternator control unit | BA15.40-P-1004-02MRT |
| Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant. | Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the overpressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses. |
AS20.00-Z-0001-01A | |
| 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 | |
| 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 | |
| Notes on safety-relevant components | AH00.00-Z-0019-01A | ||
| Remove/install | |||
| 1 | Clamp off ground line of on-board electrical system battery (G1). | AR54.10-P-0051S | |
| 2 | Remove the catalytic converter. | AR49.20-P-0100S | |
| 3 | Remove heat shield above integrated starter alternator control unit (N129). | *BA22.10-P-1004-02A | |
| 4 | Clamp off coolant lines (1, 2). | Fig 2 | |
| 5 | Remove coolant lines (1, 2) from integrated starter alternator control unit (N129) and seal openings with protective covers. | AR20.20-P-7441-01RQ | |
| Fig 1 | |||
| 6 | Remove coolant line (2) from timing case cover and place to one side. | *BA15.40-P-1009-02MRT | |
| 7 | Remove coolant line (1) from crankcase and place to one side. | *BA15.40-P-1010-02MRT | |
| 8 | Release and disconnect electrical connector (4). | ||
| 9 | Open plug housing, remove nuts (3), and remove electric lines from the integrated starter alternator control unit (N129). | *BA15.40-P-1011-02MRT | |
| 10 | Remove bracket (7) and place 48 V wiring harness (5) to one side. | *BA15.40-P-1014-02MRT | |
| 11 | Remove bracket (6). | *BA49.10-P-1034-02Y | |
| 12 | Remove screws (10) and remove cap (11). | *BA15.40-P-1004-02MRT | |
| 13 | Release and disconnect electrical connector (12). | Press release mechanism in direction of arrow (A). Otherwise, damage to the integrated starter alternator control unit (N129) will occur. |
|
| 14 | Unscrew screws (13). | *BA15.40-P-1008-02MRT | |
| 15 | Remove screws (14) and remove integrated starter alternator control unit (N129). | *BA15.40-P-1005-02MRT | |
| 16 | Install in the reverse order. | ||
| Concluding tasks | |||
| 17 | Check engine cooling system for leak tightness. | AR20.00-P-1011SB | |
| 18 | Connect diagnostic system and perform venting routine. | ||
| AD00.00-P-2000-06FR | |||
| 19 | Check and, if necessary, correct the coolant level. | *BF20.00-P-1001-04A | |
| 20 | Connect diagnostic system, read out fault memory and clear if necessary. | ||
| AD00.00-P-2000-06FR | |||
| Risk of burn injuries , suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning caused by skin contact with solid components of the exhaust. | Wear protective clothing and safety glasses. Use the extraction system. Move people out of the danger zone. | AS49.00-Z-0001-01A | |
| Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | AS00.00-Z-0005-01A | |
| 21 | Perform engine test run. While doing so, check engine for proper operation and leak tightness. |
STARTER-ALTERNATOR
| Number | Designation | Engine 256 | |
|---|---|---|---|
| BA15.40-P-1004-02MRT | Bolt, terminal box cover to starter-alternator control unit | Nm | 11 |
STARTER-ALTERNATOR
| Number | Designation | Engine 256 | |
|---|---|---|---|
| BA15.40-P-1005-02MRT | Bolt, starter-alternator control unit to crankcase/timing case | Nm | 8 |
STARTER-ALTERNATOR
| Number | Designation | Engine 256 | |
|---|---|---|---|
| BA15.40-P-1008-02MRT | Phase bolt on inverter | Nm | 11 |
STARTER-ALTERNATOR
| Number | Designation | Engine 256 | |
|---|---|---|---|
| BA15.40-P-1009-02MRT | Bolt, coolant return line to timing case | Nm | 8 |
STARTER-ALTERNATOR
| Number | Designation | Engine 256 | |
|---|---|---|---|
| BA15.40-P-1010-02MRT | Bolt, coolant feed pipe to crankcase | Nm | 8 |
STARTER-ALTERNATOR
| Number | Designation | Engine 256 | |
|---|---|---|---|
| BA15.40-P-1011-02MRT | Nut, circuit 40/41 to starter-alternator control unit | Nm | 16 |
STARTER-ALTERNATOR
| Number | Designation | Engine 256 | |
|---|---|---|---|
| BA15.40-P-1014-02MRT | Bolt, holder for wiring harness (integrated starter alternator/refrigerant compressor/transmission) to crankcase | Nm | 12 |
ENGINE SUPPORT (ENGINE SIDE)
| Number | Designation | Engine 256 | |
|---|---|---|---|
| BA22.10-P-1004-02A | Screw, heat shield to crankcase/catalytic converter bracket/engine mount heat shield | Nm | 8 |
EXHAUST SYSTEM
| Number | Designation | Engine 256 in model 223 | |
|---|---|---|---|
| BA49.10-P-1034-02Y | Screw, Rear bracket to crankcase | Nm | 20 |
COOLANT MIXING RATIO
| Number | Designation | All engines, except engine 178 in model 190.381 | |||
|---|---|---|---|---|---|
| BF20.00-P-1001-04A | Coolant mixing ratio | Antifreeze/water | Up to -25°C | % | - |
| Up to -37°C | % | 50/50 | |||
| As of -38°C | % | 55/45 | |||
| Overview and specifications sheet | BB00.40-P-0310-01A | ||||
| References to sheet specification | BB00.40-P-0310ZZ | ||||