My 190SL only had one click to the left.
Left/right function was controlled by a chrome plated toggle switch on the dash.

The bulbs for the all night lights were also separate from the running bulbs, much smaller, lower wattage.

Anybody notice that the license plate lights don't light up when the left/right lights are selected?

Jim

__________________
14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles