Why does my e34 , 525i from '88 has'nt got a headlight reminder. For almost everything wich can go wrong there's a bong and a message ( believe me, my car was not treathed well by the previous owners wen I bought it so I've seen a lot of them)

Is there an easy upgrade to built in a headlight reminder or do I have to look for a simple aftermarket product.. I really mis this feature !!!