1. Remove the cooling system hoses (1) on the engine compartment bulkhead. Carefully blow through the connections to remove any remaining coolant from the radiator.
2. Drain the coolant and disconnect both pipes (2) on the engine compartment bulkhead. Remove the bolts (3).
3. Remove the steering column (see chapter Suspension and steering).
4. Remove the instrument panel trim, glove box and stiffeners on the left and right sides (see chapter Body).
5. Remove the heater.
6. Installation is carried out in the reverse order. After installation, fill the A/C system and the cooling system. Bleed the cooling system.
[This publication was borrowed from an online resource BMWMAN]