Remove/Install Electric Coolant Pump - AR20.10-P-1281MRA
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 205 (except 205.048/049/148/248/348/349/448/449)
Engine 274.9 in model 253 (except 253.349/948/949)
MODIFICATION NOTES
| 17.10.2016 | Remove front diagonal strut, added. | Operation step 2 |
Fig 1: Electric Coolant Pump Components Location - Engine 274.9 In Model 253 (Except 253.349/948/949)
| 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 pressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses. |
AS20.00-Z-0001-01A | |
| Remove/install | |||
| 1 | Remove front and center lower engine compartment paneling | AR61.20-P-1105LW | |
| 2 | Remove front diagonal strut | Engine 274.9 in model 205.4 (except 205.448/449) | AR33.10-P-0100LW |
| 3 | Drain off coolant | AR20.00-P-1142LW | |
| 4 | Remove engine air intake duct upstream of air filter | ||
| 5 | Remove coolant hoses at electrical coolant pump (M75/11) | AR20.20-P-7441-01RQ | |
| Fig 2 | |||
| 6 | Release and disconnect electrical connection (1) | ||
| 7 | Unclip subharness (2) at electrical coolant pump (M75/11) | ||
| 8 | Remove screw/bolt (3) | *BA20.10-P-1001-01AC | |
| 9.1 | Remove electrical coolant pump (M75/11) downwards | Engine 274.9 in model 205 (except 205.048/049/148/248/348/349/448/449) | |
| 9.2 | Remove electrical coolant pump (M75/11) upwards | Engine 274.9 in model 253 (except 253.349/948/949) | |
| Check | |||
| 10 | Check rubber mounts for electrical coolant pump (M75/11) for damage and replace if necessary | ||
| 11 | Install in the reverse order | ||
| 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 | |
| 12 | Perform an engine test run and check engine for proper operation and leaktightness | ||
| 13 | Remove lower front and center engine compartment paneling | AR61.20-P-1105LW |
COOLANT PUMP, COOLANT THERMOSTAT
| Number | Designation | Engine 274 | |
|---|---|---|---|
| BA20.10-P-1001-01AC | Screw, coolant pump to timing case/crankcase/oil pan | Nm | 20 |