more r129 roof problems

DSB SL AMG

Senior Member
Joined
Jan 14, 2010
Messages
1,873
Reaction score
6
Location
Cheshire
Your Mercedes
300SL (R129 1992 Pre-Facelift), Volvo V70 D5 SE Auto
R129 Roof system layout showing micro switch positions attached.

4. Any issues check micro switch positions.
5. Check micro switch inputs with multi meter (to establish signal from RCM).

My local MB indy checked mine so will let others answer that...

4. Any issues check micro switch positions.

How can I do this, simple to do so, easy access.....diagram?

P
 

Attachments

  • SL R129 roof componant diagram.jpg
    SL R129 roof componant diagram.jpg
    80.8 KB · Views: 82
Last edited:

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
I have all the papers for testing and the sequence of the roof if you would like them
 

Parisien

Senior Member
Joined
Aug 5, 2013
Messages
434
Reaction score
27
Location
Fermanagh
Your Mercedes
SL320 1996, 1990 C124 300ce, 1989 200TE
That would be very good of you again, Malcolm, can they scan or you need my address though you might still have it on a PM,


P
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
Please PM your Email address,,,,quite a few papers.
 

Parisien

Senior Member
Joined
Aug 5, 2013
Messages
434
Reaction score
27
Location
Fermanagh
Your Mercedes
SL320 1996, 1990 C124 300ce, 1989 200TE
Got them Malcolm, thanks, resetting windows sounds like the first thing to try .....can some one go through routine?

P
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
Got them Malcolm, thanks, resetting windows sounds like the first thing to try .....can some one go through routine?

P

and yes if the roof does not know where the windows are if the battery had been flat, then the roof will just start to work then stop.

Turn ignition on, open then close each window in turn and hold the switch in the closed mode for 5 seconds.
 

Parisien

Senior Member
Joined
Aug 5, 2013
Messages
434
Reaction score
27
Location
Fermanagh
Your Mercedes
SL320 1996, 1990 C124 300ce, 1989 200TE
Great! Will give it a go on Sunday when its not going to rain over here for about 15 minutes!

P
 

Parisien

Senior Member
Joined
Aug 5, 2013
Messages
434
Reaction score
27
Location
Fermanagh
Your Mercedes
SL320 1996, 1990 C124 300ce, 1989 200TE
Great! Will give it a go on Sunday when its not going to rain over here for about 15 minutes!

P

Reset gone through, roof working correctly, thank you gentlemen of the esteemed MB owners forum!


P
 
OP
G

graham58

Senior Member
Joined
Jul 18, 2016
Messages
61
Reaction score
0
Location
alicante spain
Your Mercedes
sl 500 1992 5ltr
  • Thread Starter
  • Thread starter
  • #31
well i have my roof working again,but cant believe how simple the fix was. I had cleaned my existing fuses,the old ali type because they were corroded,but it made no difference.In the mean time i had ordered some new copper fuses.Put them in and guess what everything works.The old one must have had an air line fracture in it .Anyway i,m smiling like a Cheshire cat.
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
With the type of fuses used and the hostile environment where they sit, there will be problems with them. If you change them to the copper ceramic if you can get them, do spray both ends with a non drying switch cleaner, this keeps them free from oxygen and prevents arcing.

Once a fuse has arced, a little carbon is deposited on the contact, this grows making them arc more until contact is lost. The worst that happens is arcing produces heat, heat weakens the fuse contacts, its an on going destruction of the fuse box.

Fuses come under power supplies, and number 1 is on all faults is "is the power supply OK"

I did a long thread on this some time back.
 

DSB SL AMG

Senior Member
Joined
Jan 14, 2010
Messages
1,873
Reaction score
6
Location
Cheshire
Your Mercedes
300SL (R129 1992 Pre-Facelift), Volvo V70 D5 SE Auto
I had similar a few years ago, took out cleaned and okay...I then changed all the fuses as a preventative maintenance measure...

well i have my roof working again,but cant believe how simple the fix was. I had cleaned my existing fuses,the old ali type because they were corroded,but it made no difference.In the mean time i had ordered some new copper fuses.Put them in and guess what everything works.The old one must have had an air line fracture in it .Anyway i,m smiling like a Cheshire cat.
 

MBFAN

Senior Member
Joined
Aug 2, 2004
Messages
105
Reaction score
2
Age
60
Location
Alicante, Spain
Your Mercedes
1992 300sl-24, 2012 Fiat Freemont, 2008 Opel GT 2.0 Turbo
roof problem

Just been reading this as mine isn't working AGAIN...Been parked up with a battery saver on it. Have moved and let it go flat, removed battery and recharged fully. Started with roll bar inop and a clicking noise. Replaced the roof module and roll bar now works again. However roof doesn't lift (hard top on) if I operate in the close direction the rear cover appears to pull down but nothing in the opening direction, ie windows don't drop, if roll bar up it also doesn't go down.

This thread starts with FOOT OPERATED PARKING BRAKE not applied, I thought it also worked with the footbrake applied AM I WRONG. I'm going to try tomorrow with PARKING BRAKE applied.

Perhaps if someone could refresh my memory is it 1 & 10 in the diagnostic block for roof, if so, no faults recorded if I'm doing it right. Not carried this out for a while. Also refresh my memory on resetting the windows and roll bar, I think ive done it right but doesn't hurt to confirm.
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
If the battery has been off and recharged, the the windows must be reset or the roof will not work.

Ignition on, open fully each window, close the window and hold the switch in the closed mode for 4 seconds.
 
Joined
Aug 29, 2019
Messages
12
Reaction score
0
Your Mercedes
1991 Mercedes SL500 V8
Hi folks... Sorry to bring up and old thread, but I have a 1991 R129 SL500 with a similar roof problem to one of these chaps.

When trying to put the roof down, the windows roll down fine, the soft-top 'pops' up at the back for the tonneau to open, the tonneau cover unlatches and fully opens to its vertical position, the soft top unlatches from the windscreen... And then nothing. Every part of the process works, except the soft top then won't roll back. It can then be manually lowered, and then the cycle will finish (tonneau will latch, and the red light goes out). Red light doesn't flash.

It's the same putting the roof up. Everything works EXCEPT the roof won't pull forward, but once you manually manoeuvre it, it latches to the windscreen and the rear of the soft top latches to the rear of the car.

Is this going to be some kind of motor issue? As it'll do 90% of the manoeuvre, just not this one part, assume it's not a hydraulic or roof control issue?

I have tried to cycle the windows, this doesn't appear to have helped. I have also done it manually a few times and this doesn't seem to have reset it either. Any ideas?
 

LostKiwi

Senior Member
Joined
Aug 25, 2006
Messages
31,326
Reaction score
21,574
Location
Midlands / Charente-Maritime
Your Mercedes
'93 500SL-32, '01 W210 Estate E240 (RIP), 02 R230 SL500, 04 Smart Roadster Coupe, 11 R350CDi
The roof only has one motor and that's on the hydraulic pump.
The most likely cause is a failing switch, bad wiring or bad roof module.
 

Austy

Senior Member
Joined
Mar 16, 2018
Messages
66
Reaction score
21
Your Mercedes
1998 SL320 2003 CLK270CDI 2004 E320CDI 2006 CLS320CDI
Hi folks... Sorry to bring up and old thread, but I have a 1991 R129 SL500 with a similar roof problem to one of these chaps.

When trying to put the roof down, the windows roll down fine, the soft-top 'pops' up at the back for the tonneau to open, the tonneau cover unlatches and fully opens to its vertical position, the soft top unlatches from the windscreen... And then nothing. Every part of the process works, except the soft top then won't roll back. It can then be manually lowered, and then the cycle will finish (tonneau will latch, and the red light goes out). Red light doesn't flash.

It's the same putting the roof up. Everything works EXCEPT the roof won't pull forward, but once you manually manoeuvre it, it latches to the windscreen and the rear of the soft top latches to the rear of the car.

Is this going to be some kind of motor issue? As it'll do 90% of the manoeuvre, just not this one part, assume it's not a hydraulic or roof control issue?

I have tried to cycle the windows, this doesn't appear to have helped. I have also done it manually a few times and this doesn't seem to have reset it either. Any ideas?

What's your battery charge like? I have seen a 129 go half way through it's cycle then quit and the cause was a battery that was on it's way out. It quit with the windscreen side facing straight up in the air but it just couldn't power itself any further although it was able to put itself back down in position again. Change of battery cured it.
 
Joined
Aug 29, 2019
Messages
12
Reaction score
0
Your Mercedes
1991 Mercedes SL500 V8
What's your battery charge like? I have seen a 129 go half way through it's cycle then quit and the cause was a battery that was on it's way out. It quit with the windscreen side facing straight up in the air but it just couldn't power itself any further although it was able to put itself back down in position again. Change of battery cured it.

I actually mis-spoke in my post - None of the actual top operation works; The hood unlatches from the windscreen and tonneau cover fine (and the back window pops up to near vertical), the tonneau cover lifts, and then nothing. The rest has to be done manually. Could it be a blown fuse? I'm not sure the battery is the issue.
 
Joined
Aug 29, 2019
Messages
12
Reaction score
0
Your Mercedes
1991 Mercedes SL500 V8
The roof only has one motor and that's on the hydraulic pump.
The most likely cause is a failing switch, bad wiring or bad roof module.
Thanks for your reply - could it be a blown fuse? If most of the top operation works except the actual soft top won't move?
 


Comand (Europe) Ltd are the leading specialists in supplying and fitting Comand, Linguatronic, Media interface kits, UHI phone, IPod interfaces and much more.
Top Bottom