The provided text appears to be a set of instructions or tips for bleeding and maintaining the cooling system in a vehicle, specifically addressing issues with the 'e46' model's 'coolant light' coming on.

Here are some key points extracted from the text:

1. Ensure proper circulation: The t-stat (thermostat) should at least partially open during bleeding to ensure full coolant circulation throughout the system.

2. Check for heat and air in the cabin: If you're not getting any heat, it could indicate a jammed heater valve or an issue with the heating system itself.

Some additional tips are provided:

3. Revving the engine helps push coolant through secondary channels:

- Occasionally rev up the engine to about 2500 RPM.

- This can help the water pump circulate the coolant more effectively, especially through the secondary channel that feeds the heater core and associated lines.

4. Bleeding procedure on a cold start:

- Start by bleeding with the front end raised slightly (if possible).

- Ensure all relevant valves are in their correct positions:

* The ET Cap should be off for easy bleeding.

- Turn the heater control to its 'max' or 'heat' setting while also engaging the air conditioning if available.

5. Replacing and Bleeding Procedure:

1. Drain old coolant completely from the system using a suitable drain plug located at the bottom near the front crossmember on most models (consult manual for exact location).

* Be careful not to spill any of this fluid onto your skin or paintwork as it will cause serious burns.

2. Clean all lines thoroughly with compressed air before refilling new coolant into them.

3. Replace the thermostatic bypass valve if necessary, following manufacturer's instructions carefully throughout these steps so you don't damage anything else like rupturing a radiator hose etcetera...

4. Fill up your cooling system again until full level mark is reached on reservoir tank; then replace cap securely tightens by hand only do not overtighten at this stage since there may still be some expansion happening within components after initial pressurization.

5. Start the engine and let it idle for a few minutes to allow everything to settle down before revving up gradually through normal operating range while monitoring gauges closely for any signs of over or under pressure buildup which could indicate leaks anywhere in circuitry...

E46 coolant light