Quote:
Originally Posted by Hedders
...the fact you need to open the boot using the boot badge thingy
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Why didn't you ask me?
Well, to make it clear:
Hint #1:
The so called "Service Mode"
isn't a special function! If you press the two flippers on both sides of the locking system in the opened trunk lid manually (or with a srewdriver), it
logically locks, but the lid will stay
physically open.
In this mode, you can move the roof in any position for diagnostics and repair (
D&R), but you are always able to lift the lid in case of any malfunction.
That is your life insurance for working on the roof.
But, if you touch the BMW badge in that
D&R situation, it will unlock the flippers und you won't get it locked anymore until the roof is back in good working condition.
Hint #2:
Don't touch the BMW Badge anymore!
If you are sure the roof is back in perfect condition, you may unlock the lid pulling the badge. But never ever too early!
Hint #3:
If finished, pull the BMW badge to get back to normal behaviour.
But hey guys, if you are not able to open that center screw of the fuse box to get it slided out, please don't even think about touching anything in the roof or of it's components!!! 
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E89: Retractable Hardtop (roof) Maintenance (and additional) tasks
https://z4-forum.com/forum/viewtopic...61524#p1861524