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The missing values have default values.

wheelNames=['marbles',['plane','follow']]
wheelList=[]
RotateZ='marbles'
OutOfTrue='nan'

Every object whom name begins with 'marbles' and 'plane' will be concerned.
Every object with 'marbles' in its name will steer (all the marbles will steer)
Every object whom name begins with 'plane' will follow the trajectory without spinning
Assuming that 'nan' is not in any of the 'marbles' and'plane' objects, none will be out of true.

wheelNames=['marbles',['plane','follow']]
wheelList=[['wheel_front_left','auto',True,5]]
RotateZ='marbles'
OutOfTrue='nan'

like the example above, plus the 'wheel_front_left' object. its diameters is retrieved automatically, it's a steering wheel, its a 5 degrees out of true wheel.

wheelList=['wheel_front_left','marble']
wheelList=[['wheel_front_left','auto'],'marble']
wheelList=[['wheel_front_left','auto',False,0],'marble']

the lines above have the same effects. diameter is auto, no steering, no out of true for both objects.

wheelNames=['wheels','wl_rear']
wheelList=[['wheel_front_left',10],['wheel_front_right',10],'plane']
RotateZ='wheel'
OutOfTrue=''
ootAngle=20.0

Every object whom name begins with 'wheels' or 'wl_rear' will be concerned.
'wheel_front_left' and right have a 10 B.U. diameter.
all the wheel and wheels objects have steering (keyword 'wheel' is common and overrides default values)
but the 'plane' object and the family of object 'wl_rear' won't steer.
all the wheels are out of true (20 degrees).

wheelNames=[['Sphere','auto'],['Cube','follow']]
RotateZ='FT'
OutOfTrue='DK'
ootAngle=10

result :

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the sphere is named SphereFT.001'
the little cylinder (a bit out of true) is named 'SphereFTDK''
the other cylinder : 'SphereFT'
the floating slab : 'Cube'