Manually retract convertible roof on 95 cabriolet

no need to convert.
the electic roof can be opened manually by:-
unlock the roof using the handle on top of the windscreen and push roof back as far as posible.
lift flaps adjacent to door pillers
you will see a small lever which can be retracted (both sides)
when these levers are retracted the roof will push down fully into its compartment
when erecting the roof ensure that the two levers are fully open to accept the roof retaing lugs

there should be a manual override button, lever or switch in the trunk. your owners manual should help guide you with this. it should be right under the roof with a manual lever to bypass the system therefore resetting it. also check fuses. good luck.

audi 80 cabriolet 1998. roof open but parcel shelf does not.

I recommend gasket sealant that you would use for a motor. It's flexible and relatively cheap so if it doesn't work you not out much. Other than that a good contact cement would probably work well.

yes, there should be a manual mechanism winder, usually located in the boot / trunk, it may be behind the lining,

try some engine oil on teh moving parts

i can,t see why all these should need to be replaced,you need to get a more detailed report of what exactly they want to replace and for what reason in my experience dealerships dealing with roof faults will replace parts one by one untill the problem is fixed and surely the dealer should cover the cost of the repair if the roof faulted after only 3 weeks

Try locking your trunk lock with the key and try the top again. The top is interlocked with the trunk latch and sometimes locking the ltrunk will clear the troible.

As noted in one of the earlier questions on the topic, it appears (will verify for certain after the pump is removed) the plastic resevoir tank has cracked and the hydraulic fluid was lost. Leakage was visible in trunk once spare tire removed.
Audi also noted this is not unusual for a vehicle this age, and the replacement tank is a $100 kit.

The window can be replaced just go to a foreign car used auto parts or junkyard or go to your nearest dealer for your car and have it done.