Try:
To reset the indicator:
-The car should be off
-hold down the left instrument button (the trip odometer reset)
-while holding the button, turn the ignition to position 1 (radio)
-keep holding the button
-after 10 seconds the word "reset" will appear, then start to blink.
-while "reset" blinks, release the button and press it again
-release the button and press again
-The indicator is reset!
How do you reset the oil service warning light manually on a 2003 BMW 525i?
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You need two special BMW reset tools.
You will need a compatible BMW scan tool to reset this service light from the I drive system.
diconnect the battery for 2 minutes
The check engine light on a BMW 525i is reset by pressing the trip reset button until the engine icon appears. The Check and DC buttons are used to navigate between menus and the trip button held to actual reset the selected error.
You will need a compatible BMW scan tool to reset this service light from the I drive system.
http://www.unofficialbmw.com/e36/electrical/e36_reset_service_lights.html Here lies your answer
When a check engine light comes on the driver needs to fix the problem for the cause of the light to come on. If the light stays on, then need to perform The Stomp Test.
In order to reset the radio in a 1992 BMW 525i, you will need a five digit code from the manufacturer. Once you receive the code, you can check your user manual for the correct sequence to reset the radio.
Where the fusebox is!