How are the tires? I would think even with only 1500 miles, if it is pulling as noticeably as you say then there should be at least a slight amount of uneven wear. Check the inner inch of the tire treads (towards the center of the car) to see if any feathering is occuring as this often happens with an improper toe-out adjustment.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280