Sorry for resurrecting a fairly old thread, but my S420 is doing the same thing. It sounds a trash truck when it backs up. Are the shims available separately or do they only come with pads?

Also, sort of a n00b question, but when I use the grease, where and how much do I apply? I assume it would be a light coating along the entire back of the pad. Thanks.

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"It's not about how fast you can go, but how well you can go fast."

Bob in Richmond

'97 S320 (LWB), Ruby Red Metallic, 73k miles
'97 S420V, Smoke Silver Metallic, 155k miles