Problems with soft top

[Sparkatan]

2003 C4S cabriolet tiptronic. I have a problem with the soft top in that when I try to open it with either the dash button or key fob the latch above the dash onlocks, the clamshell opens and the windows drop but then nothing else. Then when I try to close it from that position the clamshell closes, the latch locks but the windows stay down.

Prior to this I have recently had issues with the driver’s side flap not closing and removed it to test the motor ( which works when powered from a battery) then refitted it. Since then I’ve had the problem I’ve just described.

 

Any advice anyone?

[dghii]

The clamshell is opened electrically while the top works off a hydraulic pump and pistons.  

 

 I'd start by making sure you have enough hydraulic fluid and no leaks.  Usually, failure to open is due to hydraulics. 

I recently had an issue with the top on my 03 cab 'sometimes' opening and then opening fine for days.  Situation gradually got to a similar point as yours.  removing back cover, I could tell I had a leak on passenger side ram.  I sent both off for new seals, reinstalled, added fluid and was back in the game.

[987_RDC]

There are a series of checks along the process of opening the top as various microswitches must report success for the process to go through 100%. Sounds like to me that your side flap switches are not activating. IIRC the clamshell moves and then those side flaps activate and spin down. Could also be the limit switch of the clamshell not reporting that it has opened.

 

With the clamshell opened you can pop off the hooks and lift up the back of the soft top to check the fluid level and poke around. Maybe lube up the spirals screws on the side flaps.

Edited April 30, 2021 by 987_RDC