I think one of the techs on this site sent a rep trying to sell him one packing... For me, since my 300E has a drain plug for the torque converter, they don't make any sense. For most cars where the torque converter can't be easily drained, it makes great sense.

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Bill Streep
San Antonio
'57 190SL (toy)
'08 S5500 (mine)
'09 CLK550 (wife's)
'06 SLK350 (daughter's)
'11 GLK350 (daughter's)
'03 CLK310 (spare)