I had the balancer done on friday.... I also had a collapsed mount. I have to say that I'm liking my 3rd mercedes less and less. I always thought that I got what I paid for when I bought a benz... not anymore... failing Harmonic Balancers, failing motor mounts..... what is next? oh the car is a 98 e430 with 62K on it. it might be my last benz.