Mercedes 2213203672 Shock Absorber Oil Tube For W221 And S600 Models

For Mercedes-Benz low-temperature circuit circulating pump 2219971282 exhaust problems, combined with the differences in models and exhaust difficulties, the specific methods and precautions are as follows:

First, the standard exhaust process (diagnostic equipment required)

Preparation

Ensure that the engine is cool, the low-temperature coolant has been filled to the standard level, and there is no leakage in the system.

Turn on the ignition switch (without starting the engine), connect the special diagnostic equipment (such as X-431 PAD V).

Diagnostic operation steps

Enter the system: Select "Mercedes-Benz" → "Quick Test" → Scan the whole vehicle system → Enter "PTCU - Drive Train Control Unit" or "Engine Control Module". "Engine Control Module".

Clearing error codes: If there is a short-circuit or disconnection error code for the coolant pump (e.g. "Short-circuit in coolant pump actuation"), the error code must be cleared first, otherwise the exhaust process will be interrupted.

Activate the exhaust function:

Drive train menu: select "Special functions" → "Learning process" → "Exhaust air from the cooling system in the cryogenic cooling circuit". Engine menu

Engine menu: For some models, the electric cooling pump must be activated repeatedly (7-8 times) in the "Motion Test" before entering the exhaust process.

Execute exhaust: Click "Continue to start process", the system runs automatically for about 20 minutes, and the circulating pump is activated to exhaust air.

Exhaust process monitoring

Real-time replenishment of coolant: Observe the liquid level of the secondary kettle, if it drops, add it in time to avoid air re-entry.

Completion of the prompt: the device shows "end of the process" or "processing is complete" that is successful, the water temperature alarm light should go out.

Second, the reasons for exhaust failure and alternative programs

Common reasons for failure

Failure to clear the fault code: the system has a coolant pump related fault code (such as short circuit / circuit) will interrupt the exhaust.

Hardware failure: Damage to circulating pumps (e.g. M43/4, M43/7), loss of power in 48V battery, or stalled low-temperature regulator valve will result in exhaust failure.

Multi-pump unsynchronized exhaust: The 264 engine needs to exhaust each of the three cryogenic water pumps, and missing any of the pumps will result in trapped air.

Alternative Solutions

Vacuum filling method: If the diagnostic equipment exhaust is ineffective, the use of vacuum tools to pump a vacuum and then pressurized to fill the coolant, you can quickly remove the air (especially suitable for the replacement of water pipes after the report of the short-circuit fault).

Manually assisted exhaust:

Remove the cylinder head return hose and pressurize with a water pressure gauge until no air bubbles overflow.

Activate the circulation pump (3 seconds each time) and repeat the operation until the level is stable.

III. Precautions

Key operation requirements

Prohibit coolant overflow in the exhaust, otherwise it needs to be re-emptied.

Ensure that the outdoor temperature sensor 2214663781 and the electronic fan work properly to avoid interfering with the system judgment.

Risk warning

Failure of the circulation pump may cause damage to the 48V battery, resulting in loss of data, so careful operation is required.

Some models (e.g. the new C260) may still retain air after exhausting, so you need to try several times or check the hardware.

Tips: If the instrument continues to report "cooling system failure", prioritize the low-temperature circuit switching valve, circulation pump and temperature sensor. For complex faults, we recommend contacting a professional repairer to avoid damage caused by misuse.

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