CLK convertible top problem solving: common electrical and hydraulic system failures - Page 10 - MBWorld.org Forums

Go Back  MBWorld.org Forums > Mercedes-Benz Coupes & Cabriolets > CLK-Class (W208)
CLK convertible top problem solving: common electrical and hydraulic system failures >

CLK convertible top problem solving: common electrical and hydraulic system failures

Notices
CLK-Class (W208) 1998-2002: CLK 200, CLK 230K, CLK 320, CLK 430 [Coupes & Cabriolets]

CLK convertible top problem solving: common electrical and hydraulic system failures

 
Old 10-26-2018, 03:54 PM
  #226  
Newbie
 
Join Date: Sep 2018
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
SLK -98
Serndipity,
Thank you for all your support. Would not been able to solve this without your help!

I have checked both switches. They seem to have a very similar function, so I don't think that the switch is fauly. Rather that the RB will not retract to te exact position needed.
Pusing hard on the left part of the RB will make it go down 1/4 inch or so, and the switch will get contact. However, the RB will not stay in that position.

I'm trying the simplest solution, wich seems to be to add a little material to the switch:

But another thing, I noticed thet the spring inside the assembly doesn't seem to be compressed. I don't know how the pressure is supposed to be, but this is when the RB is in the bottom position and to me it doesnt sem to be enough to extract the RB quickly. Could it be that the RB can be movable up and down with the hydraulics, without engaging the spring?
.
Johan_F is offline  
Old 10-27-2018, 11:00 PM
  #227  
MBWorld Fanatic!
 
Join Date: Nov 2001
Location: Boston North Shore
Posts: 1,013
Thanked 95 Times in 88 Posts
2001 CLK320 Cabrio
Originally Posted by Johan_F View Post
Serndipity,
Thank you for all your support. Would not been able to solve this without your help!

I have checked both switches. They seem to have a very similar function, so I don't think that the switch is fauly. Rather that the RB will not retract to te exact position needed.
Pusing hard on the left part of the RB will make it go down 1/4 inch or so, and the switch will get contact. However, the RB will not stay in that position.

I'm trying the simplest solution, wich seems to be to add a little material to the switch:

Johan.......Congratulations and give yourself a pat on the back.

The A208 power roof system has numerous complexities and your troubleshooting, observant ongoing feedback and repair skills were top-notch!

As typical in dealership repairs, the tech reads the STAR diagnostics and then starts replacing parts, without doing the required troubleshooting to determine the specific malfunctioning component.

Long story short, your brother-inlaw already paid $1,500 for a repair that did not solve the problem and would have had to made numerous trips back to the dealership and spent a princely sum of money, changing all of the component possibilities that could cause the rear bow to not release. He did not need a new pump for $8,900 and because MB does not sell individual parts to repair the RB malfunctions, repair is via replacing the entire RB assembly plus labor would have been substantially more.

Had you determined that the retract switch was defective, I could have provided you the part number where a genuine MB replacement could be purchased for 50 EU.

Additionally, everything related to the hydraulics, can be rebuilt as new or better by Top Hydraulics, who has earned numerous forum, dealership and international rave reviews.


https://www.tophydraulicsinc.com/en/...benz-a208-info


But another thing, I noticed thet the spring inside the assembly doesn't seem to be compressed. I don't know how the pressure is supposed to be, but this is when the RB is in the bottom position and to me it doesnt sem to be enough to extract the RB quickly. Could it be that the RB can be movable up and down with the hydraulics, without engaging the spring?

Reference RB assembly description in post #219.

That is most likely why the S83/5 RB retract switch was not being actuated.

When the springs on both sides of the RB assembly are not equally compressed, the synchronization shaft (#30), could have a slight cant (e.g. If the spring on the side opposite the RB retract switch is compressed less than the spring on the opposite side, the cant would be slightly downward, which kept the switch from normally being actuated).

In the event of a crash or critical driving situation, raising the RB is independent of the normal RB operation. Specifically, sensors in the vehicle suspension will tell the N52 controller to activate and unlock (#7) via the Y57/1 crash deployment solenoid, which will release the spring tension and instantaneously raise the RB.

.


Last edited by Serndipity; 10-27-2018 at 11:34 PM.
Serndipity is offline  
Old 02-11-2019, 04:49 PM
  #228  
Junior Member
 
Join Date: Jul 2014
Location: NorCal
Posts: 45
Thanks: 0
Thanked 0 Times in 0 Posts
2002 CLK55 CAB 2011 ML550 2013 GLK350
2002 CLK55 CAB: rear bow lock not releasing (but hearing slightest click)

The car's been sitting since mid-January, battery was close to dead, a bit of moisture in the car. Jumped it, tried to lower the roof but after (a) releasing front bow lock (b) windows went down on their own (c) actuated the console switch and ... nada. The light in the console switch stays solid for a short while then starts flashing. I raised and lowered (several times) the rear headrests to be sure they were fully retracted; still nothing. I'm hearing a slight click from the rear when actuating the console switch, but without an assistant at hand I can't get to the rear to pinpoint where it's clicking (will do that later today). Sounds like the click of a relay. When I first got the car (mid-'15) the top was flaky, would sometimes raise/lower, sometimes not, and I'd isolated it to a relay somewhere in back, I think in the compartment where the top is stowed when down. Replacing the relay corrected the original problem. It sounds like the clicking is coming from that general area.

Next steps?

Cheers,

Mark
markloch is offline  
Old 02-11-2019, 07:52 PM
  #229  
MBWorld Fanatic!
 
GatorMB's Avatar
 
Join Date: Oct 2012
Location: Florida
Posts: 1,383
Thanked 88 Times in 79 Posts
2002 CLK 55 AMG cabriolet Eurocharged
Battery reset

Originally Posted by markloch View Post
The car's been sitting since mid-January, battery was close to dead, a bit of moisture in the car. Jumped it, tried to lower the roof but after (a) releasing front bow lock (b) windows went down on their own (c) actuated the console switch and ... nada. The light in the console switch stays solid for a short while then starts flashing. I raised and lowered (several times) the rear headrests to be sure they were fully retracted; still nothing. I'm hearing a slight click from the rear when actuating the console switch, but without an assistant at hand I can't get to the rear to pinpoint where it's clicking (will do that later today). Sounds like the click of a relay. When I first got the car (mid-'15) the top was flaky, would sometimes raise/lower, sometimes not, and I'd isolated it to a relay somewhere in back, I think in the compartment where the top is stowed when down. Replacing the relay corrected the original problem. It sounds like the clicking is coming from that general area.

Next steps?

Cheers,

Mark
Once the battery gets low beyond systems memory settings.
It requires a reset. Especially the windows in the cab. Only relay in the rear is for hydraulic pump.
A loud humming when working. Might be quieter with trim installed.
My cab been sitting for a bit as well we'll see.
If the pump is working a good manual open and close might get the system working again.
Cheers Gator
GatorMB is offline  
Old 02-18-2019, 05:28 PM
  #230  
Junior Member
 
Join Date: Jul 2014
Location: NorCal
Posts: 45
Thanks: 0
Thanked 0 Times in 0 Posts
2002 CLK55 CAB 2011 ML550 2013 GLK350
Installed new battery (old one wouldn't hold a charge). Opened and closed the top and is so doing saw that switch s84/15 (part 2088202310) was not functioning properly: the part that slides and attaches to the end of the piston was nearly snapped, and the plastic that connects to the end of the piston was damaged (the tines of the fork were broken off so that it would no longer clip to the end of the piston). As I was manipulating the slider to see if I could get it to fit on the piston-end, it snapped. Just ordered a switch.

That said, with the top up, releasing the front bow takes the windows down, but that's as far as it gets: console switch blinks (1hz). Rollbar warning lamp seems to be behaving normally (on with key is position 2, with engine running and headrests lowered, blinks ~15s, then goes off - this tells me the rollbar switch is OK, correct?).

So would the s84/15 not being in the correct position(s) at the each stage during manual top up/down to "reset" the system be enough to prevent the top to proceed past stage 2 (windows down) to stage 3 (read bow lock released)? The chart (comment #213) that shows the the switch and solenoid states has for s84/15 that the switch is in "bow down" position.

Or should I sit tight until the switch comes before proceeding ...

Cheers,

Mark
markloch is offline  
Old 02-18-2019, 06:01 PM
  #231  
MBWorld Fanatic!
 
GatorMB's Avatar
 
Join Date: Oct 2012
Location: Florida
Posts: 1,383
Thanked 88 Times in 79 Posts
2002 CLK 55 AMG cabriolet Eurocharged
Well done m

Hi Mark,
sounds like you nailed ot. Good detective work in the ee control sequence. Takes a lot of patience and understanding when working on the unknown.
Let us know when the switch is is installed and top Happy.
Be weary if there is linkage wear.
Best regards,
Gator
GatorMB is offline  
Old 02-18-2019, 06:12 PM
  #232  
MBWorld Fanatic!
 
Join Date: Nov 2001
Location: Boston North Shore
Posts: 1,013
Thanked 95 Times in 88 Posts
2001 CLK320 Cabrio
Mark........good to hear that you found the information in post #213 the key for troubleshooting your power roof problem.

Yes, the S84/15 'bow up/down' position switch must be activating properly for the controller to proceed to the next stage whenever opening or closing the power roof.

The S84/15 switch as been a fairly common problem, with either the switch becoming unfastened from the cylinder's body or it's pull in/out extending arm, that actuates the switch, becoming unfastened to the end of the piston.

Usually the repair has only required refastening the clip (red arrow) to the end of the piston rod (green arrow).




See https://mbworld.org/forums/clk-class...t-opening.html for more information.

Last edited by Serndipity; 02-18-2019 at 06:43 PM.
Serndipity is offline  
Old 02-18-2019, 07:59 PM
  #233  
Junior Member
 
Join Date: Jul 2014
Location: NorCal
Posts: 45
Thanks: 0
Thanked 0 Times in 0 Posts
2002 CLK55 CAB 2011 ML550 2013 GLK350
Alas, the clip wont clip anymore, though I would have found some other way to fasten it had I not snapped the sliding part (it was already fatigued). What I'm wondering is whether there are any circumstances where this switch's faulty reading would prevent it from moving from stage 2 (windows down) to stage 3 (bow lock released ... which it wont). I can see how the system might balk at doing anything if during a manual soft top "reset" it saw a limit switch with incorrect values at various stages. If so I'll hold tight until the switch is replaced.

Or does it not care what the switch values were as the top was reset, and should either get to the start of stage 4 (rear bow released, bow down, but switch says "up", so it doesn't proceed through stage 4) or through stage 4 (rear bow actually up, but switch does not say "up" and so doesn't proceed go stage 5). If that's the case, and it should at least get through stage 3 (release bow lock), what next?

I guess my question is whether the state of all the switches must be sane before it will do anything beyond stage 2.

Thanks,
Mark

Cheers,

Mark
markloch is offline  
 

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 4 votes, 5.00 average.

Quick Reply: CLK convertible top problem solving: common electrical and hydraulic system failures


Contact Us About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in:
You Rated this Thread: 5