LI77.33-P-075246

Soft Top Does Not Close Completely or is Intermittent in Operation
Topic number
LI77.33-P-075246
Version
3
Function group
77.33 - Vario roof, soft top - mechanical system
Date
10/31/22
Validity
Model series 232
Reason for change
Revised repair instructions based on new findings
Complaint
Soft top does not close – Soft top mechanical components/linkage outlet flaps ("GAK") move into the intermediate position (picture 1) and then cancel the closing process.
Attachments
File
Description
Bild 1.jpg
Picture 1
Cause
There could be three causes for this problem:
A. Welding status of the stop buffer of a stop screw
B. GAK may require additional calibration
C. Additional adjustment of the stowage space locking mechanism needed
Remedy
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Initially required:
1.
2.
Software update for control unit N22/6
Installation add-on 23528 for XENTRY – XENTRY release 06/22
Steps to identify the cause are processed below. To begin with, however, the locking hooks should be checked in the
position in which the closing process is aborted by means of a visual check (see picture 2 and Locking Clip Check attachment). For this, check the locking hooks on both sides. This is the most common fault cause and can shorten the
analysis process. If one of the two hooks has not opened, proceed with step C.2. (Only step A must then additionally
be observed). If both hooks have opened, proceed to step A.
One possible immediate measure to close the soft top once: Press GAKs backward by hand and slightly lift soft top
above the locking hook (see picture 3) (possible that the locking hook audibly opens). Then close soft top using normal actuation means in the vehicle. This may not be possible in every case.
Process and check the following steps to determine the fault cause and find a remedy (even if the one-off immediate
measure proved helpful).
Please note the sequence.
A. Review of weld seam
1. Review (visual check) welded buffer of stop screw at GAK.
->Compare with picture 1.1 and picture 1.2 in attachment "Pictures of weld seam". This shows a weld that is not OK
and how it may appear in the vehicle.
2. If the weld seam requires repair: Exchange GAK. Once the repair is complete, check soft top and proceed to B if
problem reoccurs. If the soft top closes without any issue -> Close the case.
3. If both sides are OK: Continue with step B
B. Reproduce fault and record ACTUAL values
1. Reproduce fault and leave the soft top in the position it is in when the process is canceled.
Important: The actual values absolutely must be recorded in the position at which point the closing process is canceled (this can be done via video of Xentry at time of actuation/process stoppage). This is only possible in the event of a
fault. Adjusting the position using the soft top control without the fault occurring leads to false results for the actual values and means that an analysis cannot take place.
2. Record and save actual values for "GAK1" and "Soft top" via XENTRY (XENTRY N22/6 – Status of Hall sensors)
GAK requiring calibration – Analysis of actual values "GAK1"
1. Inspection of actual values "Hall sensor GAK1 intermediate position left" and "Hall sensor GAK1 intermediate position right" – see picture 1.1 in "Pictures of GAK calibration"
-> If both values are on "ACTUATED" –> this is OK and continue with step C
-> If one or both values are on "NOT ACTUATED" –> this is not OK and continue with 2.
2. Reading out calibration data of GAKs using XENTRY via – control unit log – reading out ACTUAL values
3. Export PDF
4. Review of GAK calibration values: See picture 1.2 in "Pictures of GAK calibration"
GAK1_links_Hall_Sensor_activation_from_Closed_Position, specified value: < -20
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Example: -23 good, -14 poor
GAK1_links_Hall_Sensor_activation_from_Open_Position, specified value: > 20
Example: 63 good, 14 poor
GAK1_rechts_Hall_Sensor_activation_from_Closed_Position, specified value: < -20
Example: -23 good, -14 poor
GAK1_rechts_Hall_Sensor_activation_from_Open_Position, specified value: > 20
Example: 63 good, 14 poor
5. If all values are OK -> Do not exchange actuated GAK
6. If GAK1_links_Hall_Sensor_activation_from_Closed_Position or GAK1_rechts_Hall_Sensor_activation_from_Closed_Position is below values: Move soft top into soft top position and GAK into intermediate position (see "Pictures of
GAK calibration", picture 1.3)
7. Open soft top locks using XENTRY (see "Pictures of GAK calibration", picture 1.4)
8. Gradually raising the soft top via XENTRY (see "Pictures of GAK calibration", picture 1.5) to the same height as
GAK (roughly 60-65mm)(see "Pictures of GAK calibration", picture 1.6)
Important note:
All electric motors are actuated using the XENTRY add-on without monitoring. If the desired soft top position is reached, the button must be released. Risk of damage
9. Measure minimum distance between GAK and soft top for position from previous step (a minimum distance of
15mm must be ensured from both sides of the GAK)
IMPORTANT: Carry out distance measurement at the narrowest point in the movement sequence between the top of
the roof and GAK
Important note:
The measurement must always be conducted with the soft top raised, coming from the open-top position. It should never be conducted from the closed position! (critical distance in movement). Risk of damage
10. New adjustment of not OK GAK using XENTRY (see "Pictures of GAK calibration", picture 1.7) - gradually
opening under value/over valued GAK1 to 20 mm distance (see "Pictures of GAK calibration", picture 1.8) between
GAK and soft top
11. Lift soft top to "Cobra position" (see "Pictures of GAK calibration", picture 1.9) using XENTRY (see "Pictures of
GAK calibration", picture 1.5)
12. Start teach-in process (see "Pictures of GAK calibration", picture 1.10) and confirm that the part exchange has taken place (see "Pictures of GAK calibration", picture 1.10 marked red, necessary for teach-in process start)
IMPORTANT: Select "YES" only for teach-in process (selecting "NO" can cause issues)
13. Renewed reading out of calibration data and review values – see operation steps 2 – 4
-> If all values are OK and soft top function is OK - action completed
-> If one or more values are below/above calibration values and distance of 20 mm set: attempt process a 2nd time (if
possible).
•
IF possible: Review soft top function
•
IF NOT possible: Open PTSS case and exchange affected GAK!
14. Review soft top function:
-> If OK, case closed
-> If calibration not completing, continue with step D
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C. Soft top lock does not open due to locking mechanism
1. Inspection of actual values "Hall sensor CT locking left" and "Hall sensor CT locking right" – see "Pictures of soft
top lock", picture 1.1
-> If both values are on "NOT ACTUATED" – this is OK and continue with step D
-> If one or both values are on "ACTUATED" – this is not OK and continue with 2.
2. Determine unopened locking hook (ACTUATED) using actual values and visual check. A hook is unopened in the
event of a fault (see "Pictures of soft top lock", picture 1.2 (closed) and picture 1.3 (opened))
3. Move GAKs into "inclined position", open over soft top (see "Pictures of soft top lock", picture 1.4), then disassemble rear passenger compartment seat cushion padding (AR91.12-P-1022SLY), seat backrest (AR91.12-P-1713SLY),
trim above roll bars and crossmember trim – see "Pictures of soft top lock", picture 1.5
4. Bring GAKs into intermediate position and soft top into open-top position (cf. position in picture 1.6). Then open the
locking hooks: either by reproducing the fault and supporting the jammed hook by hand, or by actuating the locking
hooks via XENTRY (see picture 1.7). If the hook jams as in the case of the fault, the soft top can be pulled upward by
hand via the hook. The hook then opens
5. Adjustment of the repository lock – increase tension on cable:
-> Release cable clamp and secure it to prevent it from falling (see picture 1.8)
-> Press roller of repository lock by hand inward up to the end stop (see picture 1.9) and hold it in place. (Information:
If this is not possible, you will need to pull very firmly in the next step)
-> If the roller is pressed inward, tension the cable – to do so, expand the distance to the sleeve of the cable to obtain
more tension – it is necessary to pull firmly on the cable! (see picture 1.10)
-> Position clamps
6. Close locking hooks (picture 1.7)
-> If soft top is operable after - attempt to open/close 1- times
-> If soft top is inoperable after - continue to step 7
7. Check the position of the repository lock in relation to the hook
-> OK position: Option 1: No contact between the hook and the roller at the top and sufficient distance at the side between the groove of the hook and the roller - cf. picture 1.11 outlined in green (top)
Option 2: Contact between the hook and the roller at the top, but with sufficient distance at the side between the groove of the hook and the roller - cf. picture 1.11 outlined in green (bottom)
-> unadjusted position: Contact at the top and very small distance between the groove of the hook and the roller - cf.
picture 1.11 outlined in red.
8. If OK: Measure complete - If softop still inoperable: Adjust stop screw. To do so, proceed as follows:
-> Loosen counternut (7 mm) of the stop screw below the cable – picture 1.12
-> Unscrew stop screw to the left (min. 1.5 revolutions, max. 2 revolutions) – picture 1.13
-> Tighten counternut and secure screw to prevent it from turning
9. Check the position of the repository lock in relation to the hook – see step 7
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10. If soft top function is OK: Install removed parts
If function still does not operate: Continue with step D
D. Create TIPS case, including pictures of problem and recorded actual values of "GAK1" and "soft top"
•
•
•
•
•
•
•
•
Include a video of attempting to operate the soft top so we can see where in motion it stops
Include a photo of the GAKs from the back of the car -- to see where GAKs line up when they are in the intermediate
position
Include a photo of the latch hooks (located on the inside of the soft top) BEFORE attempting to close the soft top
AND
after attempting to close the soft top of the where the latch hooks are stopped. There should be a roller that the
latch
hooks are attempting to wrap around.
Include a photo of the GAK linkage position and lock clip position
Additional documentation can be found: XENTRY Workshop (Local Contents) --> AMG --> 232 SL
Attachments
File
Description
Bilder Schweißnaht.pdf
Pictures of weld seam
Bild2.jpg
Picture 2
Bild3.jpg
Picture 3
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Latch Hook Positioning and Locking Clip Check.pdf
Latch Hook Positioning and Locking Clip
Photos for GAK Calibration.pdf
Pictures of GAK Calibration
Soft Top Calibration.pdf
Pictures of Locking Hooks
Symptoms
Body > Roof system > Convertible top/vario roof > Does not close
Body > Roof system > Convertible top/vario roof > Stiff/sluggish
Body > Roof system > Convertible top/vario roof > Remains stationary
Body > Roof system > Convertible top/vario roof > Malfunction
Control unit/fault code
Control unit
Fault text
N22/6 - Rear control unit (SG-FOND) (CRCM232)
B180707 - The values from the limit switches 'Soft top
lock' are implausible relative to each other. There is a mechanical fault.
B180077 - The output for the actuator motor 'Front soft
top lock' has a malfunction. The commanded position
cannot be reached.
B196777 - Right actuator motor 'Header bow 2 for convertible roof frame' has a malfunction. The commanded
position cannot be reached.
B196677 - Left actuator motor 'Header bow 2 for convertible roof frame' has a malfunction. The commanded position cannot be reached.
B196377 - Right actuator motor 'Header bow 1 for convertible roof frame' has a malfunction. The commanded
position cannot be reached.
B196277 - Left actuator motor 'Header bow 1 for convertible roof frame' has a malfunction. The commanded position cannot be reached.
Operation numbers/damage codes
Op. no.
Operation text
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Time
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Damage
code
Note
69C0V
Please refer to the TIPS document
in the dealership text, if possible with
reference to remedy (A, B or C)
69R0V
Please refer to the TIPS document
in the dealership text, if possible with
reference to remedy (A, B or C)
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