Why is my airbag light coming on when engine idles? on 1990 Mercedes-Benz 190E

My 190E has always had problems but not like this one! While my car was in idle, the Airbag light came on for no reason at all. I looked in the manual and it says nothing about it. Can you help? Thanks!

Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
abs fault likely