It's the first year of the W211 body (in the US, anyway). It's also the M112 motor, which is the V6 first offered in the US in 1998 on the 320/280 models.
So it is a different motor than your 97 (which the M104 motor).

And I don't know what pix or part numbers you mean?
I had the fuel pump and the fuel pump level sending unit replaced about 5 months ago... sorry, don't have part numbers off hand.

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2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)