richardjjs

I have tried everything
Until recently my 208 CLK 2002 Final edition Cabrio Roof worked OK. It shuts OK but the opening is now a problem
I think it did have a small problem on opening
Using Mercedes Illustration
GF77.30-PP-2002KA Open Soft Top Function


Stage 0 - Stage 6 ALL OK
Stage 7 OK
At this stage the Windows have dropped (On turning the Release Lever)
Pressing the Switch S84 Now Unlocks and Moves the SoftTop Bow upwards, Soft Top Cover is Unlocked and Moved Upwards, Soft Top Bow moves into Compartment


At this stage Pushing the Handle does Nothing (It used to then trigger Moving the soft top into the compartment)
Nothing at all happens from here
Stage 8 - 11 just don't happen.


I CAN EITHER
turn off the ignition and move the soft top into the compartment, Push the Soft Top Cover down and lock it manually. I can then close the Soft top automatically and correctly with the switch, Locking the release lever and the Windows shut fully and the Rollover bar goes up if it was up before (It does not chime)


OR
(With the soft top bow in the compartment)
Turn the ignition on and off And Fully Close the roof automatically as above


Note I have replaced Roof Hook Position Sensor (A208 820 2310)


I also took it to a Merc Main Dealer in Shrewsbury who ran the MB Diagnostics which showed nothing all OK
FILTER STATUS ALL CONTROL UNITS
BUT looking at it the only reference to the roof is
RVC Rollover Bar Soft top control Module


The others are ETC , ESM, ME-SFI,ESP,BAS,VP,AB,OCP,EZS,PSE,SAM,LCP
RVC,ICM,COMAND,CDC,CTEL,PTS,DCM2,DCM1
ESA-FL,ESA-FR,AAC,


None of which have any bearing on the ROOF!!!
I knew these where ok - Have they run the right test!


They suggested it was 110.00 plus vat per hour and it could take 10 hours. They have suggested checking all the sensors manually


This is really causing problems


Have checked the fluid levels - All OK


Next I am going to test all the switches and Sensors


The System seems not to be sensing that the Soft Top Bow has dropped into the Soft Top Compartment






richardjjs@yahoo.co.uk

Serndipity

At stage 8 failure, I would verify that the controller is receiving the proper signal conditions after stage 7 operation...specifically:

+ from the cylinder-switch soft top cover unlock/lock
+ from the 2 soft top cover open/closed switches

If not, check for faulty switches or wiring.

See: https://mbworld.org/forums/clk-class...-failures.html

richardjjs

Will check these tomorrow - thanks


Do you thing Merc Dealer check the fault codes


Only one of the codes had any relevance to the Roof (RVC Roll over bar soft top control module)


Not sure about this
.
Thanks Again

Serndipity

The MB STAR Diagnostic System (SDS), should have been able to read out the power roof fault codes, but that depends on the knowledge/skill of the mechanic using it.

FWIW, on anther vehicle, I had a factory scheduled service done by a dealer. When I looked at the charges and what they did......there was a charge to adjust the valves, but the car had self adjusting values. Was also a labor charge to replace the spark plugs, but no charge for the plugs. Had them pull a plug, found it to be an old plug. Go figure!

There is single controller (e.g. that controls both the roll bar and roof). During each stage, it checks for all the required conditions (e.g. to open or close the roof) to be present, before initiating the next stage.

Where you roof is getting stuck, requires that the hydraulic lock has released to properly open the soft top cover and that the it's required position has been confirmed by the (2) soft top open/closed position switches.

There is a ton of additional information on this in the link previously sent above.

richardjjs

Have booked the car in to another dealer Friday where they have a VIP{ Invitation Event at the same time
Hopefully will sort out the problem B4 then
Will test the switches suggested by you
Thanks

richardjjs

Cant get to look at Switches etc it keeps raining!!!!

GatorMB

The headrest is an important function as well as the trunk and luggage boot.
Luggage cover closed, Trunk Closed, Headrest down. all conditions met before bow opens.
You likely have faulty wiring near the passenger hatch hinge stopping the control sequence of operations. (common)
Remove the carpet on the hatch cover and inspect the bow lock limit switch as well.

Gator

richardjjs

The headrest is an important function as well as the trunk and luggage boot.
Luggage cover closed, Trunk Closed, Headrest down. all conditions met before bow opens.
You likely have faulty wiring near the passenger hatch hinge stopping the control sequence of operations. (common)
Remove the carpet on the hatch cover and inspect the bow lock limit switch as well.


The Bow has opened
And so has the Hatch
The bow has gone part way into the compartment but this is not triggering the roof to continue closing. New Roof Hook Position Sensor Fitted which I would have thought would have triggered the completion of the movement
So the BOW has dropped but the Soft top does not continue


Which is the Bow Lock Limit Switch please


Thanks again

richardjjs

Is the bow operated by the same ram as the Roof
because its almost as though the Bow Ram is only working in one direction
I closes the roof but doesn't open it
have checked switches and they seem ok

GatorMB

Hmmm, I may have mis guided you, Lets see.
Once the bow starts to load into the open hatch compartment - tensioning cables in the linkage help to bend the front part of the roof to complete the opening process.
The cables stretch and eventually break, I have always held the top up about 8 to 10 inches to keep this from happening. Once the top closes you must catch it to avoid slamming down on the pillar locks and damaging them.
A failing bow lock circuit will be evident during hatch movement.


If the linkage is binding, the pump will go into overload and shut down to protect other systems.
Maybe this is closer,


Cheers, Gator

richardjjs

Now we seem to be getting somewhere thanks


I have already tried , once the bow starts to go into the compartment, helping the roof into the compartment this does not help


I presume the cables under the outer cover


Will look tomorrow - Its been great weather here today - its about to get dark


Speak soon


REALLY APPRECIATE THE HELP

Serndipity

A very good next step would indeed to check the two tension cables.

Using the forum's search function, to get more information information on repairing/replacing the cables.

Here is one from another MB forum.

http://www.benzworld.org/forums/w208...fixed-1-a.html

Note: When the cables are broken/stretched, the problem of the roof not fully opening can be because the front-most joint on the convertible top must stay "broken" and cannot fall into the "locked-out" straight position when the hydraulic mechanism first lifts the rear window (e.g. see last picture in post #7).

GatorMB

Right Serendipity, I read through that one some time ago The Cambell steel crimp fittings are no longer available but it is very knowledgeable for DIY people like us.


He is in Europe so Lowes is probably the other condition. Hmmm


Anyway, the front part of the roof must be partially bent to allow collapsing of the rest of the structure, It is kind if egg shaped and we must overcome the cable issue manually giving it a shove while it is working to open. The cables are reasonably priced wholesale and a lot easier to change than thought. @ 60-80 $ each.


The weather has been top town in Florida for a few weeks now except in the afternoon, I leave work headed for the country normally around 9:00am top down while most are on the first tea. It is a different world watching others race to work in the morning.


Gator

richardjjs

Gator
Just to let you know my other car is a Porsche 911 2002 Cabrio Black with RS2 Spoiler
Just spent a week up in Skye of the North West Coast of Scotland (Harry Potter Country) and had the roof down much of the time
WE went up there last September in the Merc and it was down all the time -
Its just makes life worth living roof down driving across Glen Coe at 120 mph with the roof down!!
Did you see the Top Gear when Clarkson was driving cabrio Ferrari across 'Hertford' this was actually the roads we had driven on last week
Only regret - Want to move to Skye


Also owned a few urquattros in my time!! (Only thing wrong with those was they weren't Verts!!)


REgards


Richard

richardjjs

Have just checked the Cables
Firstly the top does not bang down - it does sometimes come right down onto Windscreen some time as much as 4-5" away. Always pulls down easily
(Have always had to give it a push upwards after the Bow dropped into Compartment)


BUT I have also checked the cables
When the roof is fully open in FULLY in the compartment (at present manually) with the cover open there is slight 'give' in both cables - by slight give I mean enough to undo the bolts


When I close the roof so its not been locked the are tight with no give


A little more info about the fault


Bow releases and opens, Compartment Releases and opens, Bow drops to approx. where it would be if the compartment was closed
Motor continues running for about 5 secs and there is a click (Not the compartment)


NOTE WHEN IT CLOSES THE BELL DOES SOUND (Reported earlier it does not)

richardjjs

JUST RESET THE PUMP WITH A SCREWDRIVER TIGHTENING IT UP


Why is it always something simple. Our local Audi mechanic always says start at the cheapest part. Many years ago I totally rebuilt the top end of an Audi Quattro (1988 MB) Wide Body. Could I get it running right - no chance.
The ;Quattro owners club guru suggested it was the ECU. A great specialist from Suffolk spend 2 hours trying to sort it out. No Good
Malcolm comes along and spots that one of the auxiliary fuses in the Fuse box is in the wrong place - Went really well after that!!!


TOOK A LONG TIME TO LIVE THAT ONE DOWN!!


Thanks everybody

Top Hydraulics

Congrats on the fix. Just to clarify for everyone: someone had previously opened the pressure relief valve on the pump, probably for manual operation, and not closed it again all the way. It is the valve with the white plastic cone on it that you can reach through a hole in the carpeting of the trunk. More details in http://www.tophydraulicsinc.com/W208...eplacement.pdf.

No need to be embarrassed - you're not the first one this happened to. I usually first say "retrace your steps" to my customers when they call with a problem after DIY repair attempts, but it is often difficult to stay focused when you are worried about some expensive repair needed.

Contact us once the hydraulic cylinders for your Porsche convertible top and the hydraulic cylinders for its rear spoiler start leaking... ;-) http://www.tophydraulicsinc.com/en/8-porsche

Klaus

www.tophydraulicsinc.com

borosteve58

my w208 merc the roof will not go down or the windows its been on a diagnostic machine when it finished it work the windows went up and down the next morning they do not move so the windows have been opened all night . the fault on my read out was unit 52 soft top control module . i asked mercedes how much they came up with a price of £400.my friend tried his tested on the fuses in the boot then i drove away and after 20 second i tried my roof and it folded away .is there some else like a crossed wirer and plus my boot will not open thx stevey