BMW 320D,2006- run flat tyre warning light is on. How do I reset?

Using the indicator stalk, navigate to the tyre pressure reset option, press the reset button twice in short succession but hold it in the second time until a tick appears on the display

Can someone tell me how to reset the run flat warning light 320d i dont have i drive

Firstly make sure you have the correct tyre pressure in each tyre.
Using the iDrive Press the menu button, the start menu is called up.
Press the controller to call up the "I" menu
select vehicle setting and press the controller
select "RPA" and press the controller
Start the engine but do not drive off yet
Select "tyre pressure" and press the controller
Select yes and press the controller
Drive off the message "Initialising" is displayed
Initialising is completed during the journey. the controll display then shows Status "RPA Active" again.
This should stop your warning light from coming on

I have bmw 320 model 2009, the tyre lamp turned on
what does that mean..the pressure is fine for all of them???

In BMWs to reset most items we got 3 ways:
1) holding the trip indicator and turn the key to step 1;
2) using the indicator, simply the little stick behind the steering wheel;
And
3) IDrive.
In 2004 models with IDrive, it is a simple task, go to the menur and explore the options. Reset the tire pressure, check on the oil level, reset your oil change and etc.
In other models, the procedure is a bit different, it is not very graphic.
By using the indicator, the little stick behind the steering wheel! You simply brows over the options by pressing on its button and select the right option when it appears on your little screen by the milage indicator.