How to test a roof top.
It is working properly, but is there any other specific tests

Look for leaks in the hydraulics. Main rams dump in front of the rear wheels.

Make sure the top cycles and the red light in the switch goes off after cycle is completed.

Jim

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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