Its easier to freeze them a day before replacing them.
There is a diy for the w210 on benzworld.
here is the link, I hope it might help
http://www.benzworld.org/forums/w210-e-class/1488483-diy-rear-axle-carrier-mount-rear.html

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E300TD year 2000. RUSTY SOLD
cost a fortune to maintain on the road
but run well on WVO
Second Merc died due to corrosion ( NOT rust) How can mercedes get away with that for so long?
Third lasted a month then went away...
Fourth now... Corroded too...