Most two-lane roads are crowned (high in the middle, between the two lanes). Many other roads are also crowned. This would cause the car to veer to the right.

Other roads are banked, such as certain freeways. The slant can go either way, depending on the curve direction.

All this is done so the roads can shed water in a rain.

If your car is pulling to the left, this goes against the crown direction and suggests the right caliper isn't grabbing as much as the left.

Given the age of the calipers, it may be time to overhaul or replace them. Nowadays, a completely rebuilt caliper doesn't cost much more than a rebuild kit, hence people rarely rebuild calipers anymore. Calipers are generally replaced in pairs when replacement is due to age.

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95 E320 Cabriolet, 169K