is variable depending on road conditions. For example, if you are turning right onto an uphill street, your steering wheel angle will be different than if turning downhill (or on the level).

So long as your dead spot on center does not exceed a total of one inch measured at the steering wheel rim, your system is probably o.k. Our cars have recirculating ball steering which is somewhat less precise and 'tight' than rack and pinion steering. MB specifies about 1" play on center as I described above.