hey everyone!

98 (manufactured 12/97) c280 over here. recently, ive been hearing a slight squeaking noise from the engine compartment. i took a look under the hood to see if i could locate the source of the noise and then i noticed that the crankshaft pulley was wobbling while the car was at idle. i killed the ignition and then i noticed that the inner rubber ring was coming out of the pulley frame. after reading parts of this thread, i guess the harmonic balancer is a big problem for m112 v6s. how much would it cost to fix this problem?