abs light
 

abs light comes on after applying the brake a few times and stays on.

Check all tyres are the same size and inflated to the correct pressure.

What car is it?

It is a 1987 300E, It does have aftermarket wheels and tires.
This is my first benz and love it, trying to undo neglect from previous owner. This can run into some $$$, but I hope it is worth it in the end.

ABS
 

Check your front wheel abs sensors. Your problem may just be arround it.

Thank you for the tip, will be the next area I check.

Aftermarket wheels and tyres may be the cause of this if they are not all the same size.

Once you have checked this, and the tyre inflation, then ABS sensors and wiring back to the computer will be the next thing as TKbenz suggests. There is only one sensor for the rear wheels, it is on front of the diff. If the diff is a non standard ratio then this could also cause the problem.

If the ABS computer thinks the wheels are not all rotating at the same speed, and it can't correct this by releasing the brakes, then it thinks there is a fault, shuts down and brings up the light.