Thought I'd throw up some photos of the parts:

Thios one shows an exploded view of the dismantled pump. From leftt to right are:

3 Pulley Bolts

Pulley

Shaft with pulley mounting plate

Above the shaft are the deteriorated buffer seal, replacement Vickers seal (too small) and that tiny ring that locks the shaft into the front part of pump.

4 Pump bolts

Front part of pump

Impeller with 10 vanes. 4 vanes are in, the rest are out.

Impeller housing. The black line is an O-ring. (FYI: The pump's O-rings were in new condition. )

Back of pump.

(The silver disc in the lower right is a neodymium magnet. I attached the impeller shaft's locking ring to it to prevent loss.)

Attached Thumbnails

 

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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