Remove/Install Power Electronics - AR08.20-P-0011LVH
WARNING: This page is about a different car, the 2023 Mercedes-Benz GLC300, 2022 Mercedes-Benz GLC300, 2021 Mercedes-Benz GLC300, 2020 Mercedes-Benz GLC350e, and 2020 Mercedes-Benz GLC300. However, it is still accessible from the selected car via links, so may be relevant.
Engine 274.9 in model 253.354/953/954
| 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. | AS00.00-Z-0035-01A | |
| 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 | |
| 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 | AH00.00-Z-0300-01A | |
| Notice | Information on preventing damage to electronic components due to electrostatic discharge | AH54.00-P-0001-01A | |
| Notice | Notes on battery | AH54.10-P-0001-01A | |
| Remove/install | |||
| 1 | Perform enable for the high voltage on-board electrical system | AR54.10-P-1150LVH | |
| 2 | Detach on-board electrical system battery ground line | AR54.10-P-0003LW | |
| 3 | Remove left underfloor paneling | AR61.30-P-1001LW | |
| 4 | Remove reinforcement (2) | *BA61.10-P-1004-01L | |
| 5 | Drain coolant from low-temperature circuit | AR09.41-P-6834LW | |
| 6 | Unfasten cable ducts (3) on the overall length of the left frame floor assembly | ||
| 7 | Unclip electrical line (6) from power electronics (1) | ||
| 8 | Release and disconnect the high voltage plugs (7, 9) | ||
| 9 | Close the high voltage plugs (7, 9) with protective covers | Fig 8 | |
| Fig 9 | |||
| 10 | Release and disconnect electrical connector (8) | ||
| 11 | Remove screw/bolt (4) and place potential equalization line (5) to one side | *BA08.20-P-1004-01I | |
| 12 | Support power electronics (1) and secure against falling down | ||
| 000 588 11 62 00 Major assembly mount | WS01.00-P-0092B | ||
| 000 588 10 62 00 Support plate | WS26.00-P-3309B | ||
| 13 | Remove screw/bolt (12) | *BA08.20-P-1001-01I | |
| 14 | Lower the high-voltage distributor (11) with power electronics (1) | Do not put high-voltage lines under tension. Otherwise the high-voltage on-board electrical system may be damaged. |
|
| 15 | Clamp off coolant hoses (14) as close possible to power electronics (1) | Fig 7 | |
| 16 | Loosen clamps (15) | Fig 5 | |
| 17 | Detach coolant hoses (14) from power electronics (1) and catch escaping coolant in a suitable container | ||
| 18 | Close off coolant connections of the power electronics (1) using suitable stop plugs | Fig 6 | |
| 19 | Detach high-voltage distributor (11) from power electronics (1) | AR54.10-P-1400-01LVH | |
| *BA54.10-P-1003-03E | |||
| Fig 3 | |||
| Fig 2 | |||
| Fig 4 | |||
| 20 | Close off high-voltage distributor (11) with cover and secure the cover against falling down | Protect high-voltage distributor (11) against moisture and dirt particles. Otherwise contact problems and damage to high voltage on-board electrical system can occur. |
|
| Fig 3 | |||
| 21 | Close off open plug contacts of the power electronics (1) with protective covers | Protect power electronics (1) against moisture and dirt particles. Otherwise contact problems and damage to high voltage on-board electrical system can occur. |
Fig 2 |
| 22 | Remove power electronics (1) | Ensure absolute cleanliness of plug contacts and seals. Otherwise water entry and isolation faults can occur. |
|
| 23 | Detach vent line (10) | When replacing the power electronics (1). | |
| 24 | Detach potential equalization line (5) from power electronics (1) | When replacing the power electronics (1). | |
| *BA08.20-P-1003-01I | |||
| 25 | Detach brackets (17, 18, 19) | When replacing the power electronics (1). Align screw/bolts to the old imprints on holders (17, 18, 19). |
|
| Otherwise, mounting problems may occur. | |||
| *BA08.20-P-1002-01I | |||
| 26 | Install in the reverse order | ||
| Initial startup | |||
| 27 | Commission power electronics (1) | When replacing the power electronics (1). | |
Electric motor control unit → Adaptations → Commissioning. |
AD00.00-P-2000-04B | ||
| 28 | Read out and erase fault memory | ||
| AD00.00-P-2000-04B |
CONTROL UNITS
| Number | Designation | Model 253 with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)) | |
|---|---|---|---|
| BA08.20-P-1001-01I | Bolt, bracket for power electronics to body | Nm | 23 |
CONTROL UNITS
| Number | Designation | Model 253 with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)) | |
|---|---|---|---|
| BA08.20-P-1002-01I | Bolt, power electronics to bracket | Nm | 9 |
CONTROL UNITS
| Number | Designation | Model 253 with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)) |
|
|---|---|---|---|
| BA08.20-P-1003-01I | Bolt, potential equalization to power electronics | Nm | 16 |
CONTROL UNITS
| Number | Designation | Model 253 with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)) | |
|---|---|---|---|
| BA08.20-P-1004-01I | Bolt, potential equalization line to body | Nm | 16 |
HIGH-VOLTAGE DISTRIBUTOR
| Number | Designation | Model 253 with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)) | Model 253 with code ME02 (Fuel cell) | |
|---|---|---|---|---|
| BA54.10-P-1003-03E | Bolt, high-voltage distributor to power electronics | Nm | 15 | - |
FRAME FLOOR ASSEMBLY
| Number | Designation | Model 253 | |
|---|---|---|---|
| BA61.10-P-1004-01L | Bolt, rear reinforcement to frame floor assembly | Nm | 24 |