Since the vents are controlled by mechanical levers, you must have the classic W114/W115 fan failure.

Good luck, rumor has it that the fan in a W114/W115 was hung on a wire and the rest of the car was built around it.

Some people have had success going in through the plenum via the grill in front of the windsheld and lubing the fan bearings.

Otherwise, disassembly of the dashboard is required.


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