My 1988 560sl pulsates the brake pedal when I pull out of garage in the morning or (abs is being activated)
The brakes , rotars ,hoses , are all new
calipers are rebuilt, fluid is new
when I purchase the car this summer the motor relay for the abs was missing
I replased it and thats when the abs started working . maybe too much
The sensors are all cleand up front and back
I also checked the resistance of each one and they are are within spec.
the abs sometimes comes on at a slow speed stop during the day
but this is happens hardly at all
Is there a problem or thats something normal for that model?
Some of the old threads say this action in reverse is a test, but I can't see how the abs knows when to test itself at least in that year.
Any help would greatly appreciated