Hi and welcome. The motor might need fluid or may need changed it is located under the back seat on passengers side there screws on the lip of the seat to get it up. if you need anymore info let me know.
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I would try changing the fluid.just siphon it out and change it.
here are the saab specs for your top and proper fluid level. If you need anything else let me know.
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you need to replace the antenna mast.the assembly will need to be removed to do this.
you need to remove the black nut on the top of antenna, in the trunk remove covering you will see the antenna assembly. the bolts are either 8mm or 10mm which hold it to the body.there is a drain tube at bottom you easiest to pull out from body . remove assembly. there is a 7mm nut in the middle of the assembly that holds the cover you must take this of there is probably a length of nylon cord in there from the old antenna. Pay close attention to how things come apart so you can put back in correct order reassemble. the next thing is to remove the 2 philps screws in the base of the antenna cylinder. Remove the antenna cylinder .i use a 24" long 1/4 drive extention to bang out the old locking sleeve. After that put back together and reinstall the assembly . switch car on turn radio on you will hear the antenna wait till it finishes then feed the new nylon cord in till you feel it make contact the the gears turn radio off and let antenna feed in. install the locking sleeve and the cover and nut. i wish i had diagrams for you but my system show the detail needed to preform this job.if you need further help or you get stuck let me know i can probably talk you through it.
do you have a new antenna mast?
you need a new antenna mast. eeuroparts.com has them.
you paid for the first question it is up to you if you pay for this second one.
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