ABS Sensor 420SE W126
 

My ABS warning light keeps comming on afer 2-3 minutes journey time, it does not come on when the brakes are warmed up though.

Also I have noticed that if I brake at a very low speed <5mph, I can actually feel what seems like the ABS kicking in and vibrating the brake pedal, wierd..

Anyway, I tried to get one of the sensors off the front wheels to start checking them, and after I took out the allen bolt the bloody thing was jammed in good and proper.

Any tricks on how to safely remove these things so I can give them a good clean ?