They definitely need to know about MBs as your car has no provision for caster or camber adjustments without the installation of a new bolt kit. You may have just screwed the toe-in which directly messes the steering wheel, but if you were to need caster or camber you need to know about the bolt kits.

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