I was kidding of course about the timing. The timing of this thread has aided me in my article which I have now just about finished. I did bring up the issue but didn't get into explanations or advise. This is an article intended to be read by technicians and it will be archived. I can hardly take a stance saying something is not necessary in print when MB clearly calls for the opposite.
The bar is placed on the front side of the tires and would move the tires toward toe out. Sooo not using it should make the tires toed out compared to using it. This would cause tires to wear on the inside. Normal toe range is about 2-3mm (In other words toe = 4mm + or minus 1.5mm would give a range of 3 mm). Tight front ends will not spread that far so the effect is miniaml on a tight car.
Bosch Master, ASE Master, L1
33 years MB technician