Just completed this job.

Passenger side pads were paper-thin, literally, and one piston was extended as far as it could go -- and leaked a some fluid -- about a tablespoon or so -- when pressing it back into the bore (and leaked no more after that).

In the process, I believe air entered the system. Is a full bleed necessary now?

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2008 E350 4matic / Black/Anthracite

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Gone but not Forgotten:
2001 E430 4matic, 206,xxx miles, Black/Charcoal
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black