I'm desperately trying to find the weight of a 722.906 transmission from a 2007 E350 base.

I mailed a faulty transmission back and they claim it weighed over 500 pounds! I estimated it at 125 lbs, which may have been light, but I need a spec sheet indicating the actual weight of the transmission so that I can get my $595 back that FREIGHT-Center's carrier charged me!

PLEASE HELP! I've spent hours searching the internet and making phone calls, but to no avail.

Thank you SO Much for any intel!

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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!)