How to reset the service indicator in 1990 BMW 525 i?

I have changed engine oil,gear box oil in my 1990,525i BMW.I didnt know how to reset the service indicator.Can anyone help me out please??How to reset the service indicator in 1990 BMW 525 i?Go to Ebay and search for BMW reseting tool. Its not more than 5-10 quids. Its very easy to use and comes with all instructions in it.How to reset the service indicator in 1990 BMW 525 i?Go to dealer, or most service places; they have a tool that will reset the light (it connects to the car's computer)How to reset the service indicator in 1990 BMW 525 i?Just ground pin 19 of the diagnostic connector to one of the nuts on the shock tower for 3 seconds for an oil service reset.