you can temporarily clear the light by disconnecting the negative battery for a minute, or using a code scanner, but if you havent fixed the cause it will come back on.
reset service engine light on BMW 325
remove the negative on the battry for two hours
Take the car to the nearest dealership and have it serviced. You can't turn it off. There is a problem with the car.
Have vehicle scanned to determine the problem (usually in the emission control system) and have codes cleared
you need to have the check engine/service engine soon fault codes read to determine what the fault is.
disconnect the negative battery cable, wait a couple hours, then reconnect. If you are trying to reset the inspection service light you will need to take it to someone or get on a board for model specific info.
go to your dealer and they will fix it for you.
SES = Service Engine Soon
The engine computer has detected a malfunction and set a code.
All depends if you have a E24, E39 or E60 Once you find out.... then search it in google.
How I can reset my BMW 650 CI service Due 75 K miles.?
many service lights on the new 3 series you cannot reset yourself, this is a software error by BMW and they are aware of this but currently no fix is available, the only way to reset it is to have a BMW technician reset it with their special service equipment.