I had my 2000 ML320 in for service at the local dealer today for a check engine light (oxygen sensor gone bad). While there they were also performing a B plan service. During the B service they informed me that they felt all four wheel's brake pads and all four brake disks needed to be replaced and wanted slightly over $1,200 to do so. This seems rather high to me.

The vehicle now has about 83,000 miles on it. The front pads were replaced at 40,000 miles. The rear pads have not been changed. There have been no warning indicators or anything, no squeaks, squealing, etc. The disks are smooth and have no grooves in them either. They would not just replace only the pads.

Any thoughts?

Clayton