I doubt that one size different pad with correct that. There are no corrections for camber on your car so he couldn't have adjusted it worse. Its possible a toe correction might change it a small amount.

Unless you have some seriously wild tires you are paying too much. You should click on the Tirerack logo above and check pricing and then find a local authorized tire rack installer to mount them for you. Toe adjustment is probably more important than camber to tire wear but you are likely to loose 25% or more of their life with those rear settings.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician