About 2 years ago, I purchased these brake pads for the front wheels of my 1988 190e 2.3. I vaguely remember they guy saying "these pads have a lifetime warrantee"...as I walked out of the store it occured it me that I nevered heard that being said for brake pads before-i would think that its a wear item that you replace every so many thousands of miles.
I installed them and drove the car for 1 year before checking them again, they showed almost no wear at all! I probably drove the car 15000 miles in city conditions that year. Another year went by and again they show almost no wear!

Is there a new type of brake pad out there on the market or some new technology that they are using that allow these pads to last a very very long time?

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1996 E320
2000 C230 Kompressor
1988 190e 2.3 - 225K miles, owned for 7 years. I cannot say enough good things about this car. Very well built, even at 225 it ran like new.