190 2.6 question

[Emmerich]

I have a friend with a 1990 190 he might sell. I test drove it and the ABS was acting weird. It was engaging under normal (dry) braking, but not consistently. He had just been washing the car and I was thinking maybe something got wet, but I do not know if that was the problem. My question is: do these cars have any known issues with the ABS?

thanks
Fred