54 90... Troubleshooting, automatic convertible top
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| Fault | Cause | Movement | Remedy |
|---|---|---|---|
| Soft top does not open or close | Battery voltage is < 10.5 V | opening and closing | Charging battery or run engine |
| Ambient temperature too low | opening and closing | Raise ambient temperature to > -20 °C | |
| Hydraulic pump motor temperature too high | opening and closing | Hydraulic pump motor ≤90 °C | |
| Terminal "15" not switched on | opening and closing | Switch on terminal "15", check terminal "15" fuse | |
| Convertible top not unlocked | opening and closing | Emergency operation | |
| Rear lid not closed | opening and closing | Close rear lid | |
| Speed > 40 km/h | opening and closing | Reduce driving speed | |
| Convertible top compartment not completely lowered | opening and closing | Lower convertible top compartment | |
| Rear window lowered | opening and closing | Completely lower the rear window | |
| Door windows not lowered | Open | Fully lower side windows | |
| Fuses defective | opening and closing | Check fuses | |
| Leads interrupted | opening and closing | Refer to diagnosis | |
| Plug connection interrupted | opening and closing | Check plug connections, repair if necessary | |
| Control unit faulty | opening and closing | Refer to diagnosis | |
| Hall sensor fault | opening and closing | Refer to diagnosis |
Check Control messages
It is not possible to open and close the soft top in certain situations.
Corresponding Check Control messages are displayed in the instrument panel for this purpose.
The Check Control messages serve to explain in closer detail the red or yellow LED on the button which lights up in the event of a fault.
| No. | Color: | Check Control message | Central Information Display: |
|---|---|---|---|
| 1 | White | Roof! | Roof |
| Drive slower | Speed for opening/closing the roof exceeded. Reduce speed and continue opening/closing. |
||
| 2 | yellow | Luggage-compartment partition! | Luggage compartment partition Not possible to open roof. Move luggage compartment partition to the position required. |
| Roof | Roof Opening/closing not momentarily possible. Possible causes, see Owner's Handbook. |
||
| Roof | Roof Roof control failure. Manual opening/closing possible, see Owner's Handbook |
||
| 3 | Red | Roof | Roof |
| Check lock! | Control system failure! If securely locked, trip can be continued. For information on checking the locking, see Owner's Handbook. | ||
| Roof not locked! | Roof Roof not locked! First open or close the roof completely, then continue driving. |
In event of function problems:
- Check ambient conditions (e.g. soft top compartment floor, tailgate, rear window, etc.)
- Perform diagnosis on convertible top (mechanical components, hydraulic components, sensors etc.)
- Perform emergency operation (see Owner's Handbook)