SL/R230: Lots of little issues
Thread Starter
Junior Member
Joined: Mar 2015
Posts: 28
Likes: 0
From: Maine
2003 sl500
Lots of little issues
. My 2003 sl keeps blowing the soft close fuse #56 I think 20 amp. I recently repaired the leaking ports on the trunk lid latch. Everything work for a day now I can hear the pump but when it nears the end of its cycle it blows the fuse. This blown fuse prevents the top from operating and doors from locking . Any thoughts? Thanks
Member
Joined: Sep 2019
Posts: 230
Likes: 87
From: Northwich
R230 350SL
. My 2003 sl keeps blowing the soft close fuse #56 I think 20 amp. I recently repaired the leaking ports on the trunk lid latch. Everything work for a day now I can hear the pump but when it nears the end of its cycle it blows the fuse. This blown fuse prevents the top from operating and doors from locking . Any thoughts? Thanks
Banned
Joined: Jan 2006
Posts: 1,982
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From: Atlanta, unfortunately
'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
The pump motor is drawing too much current surely due to a faulty impeller. Someone on this forum or Benz World described a reasonably-priced repair kit a few weeks ago. Another member stated they had no interest in restoring pneumatic operation but wanted their roof working. In that case removing the impeller would be a solution.
Thread Starter
Junior Member
Joined: Mar 2015
Posts: 28
Likes: 0
From: Maine
2003 sl500
Yes.
The pump motor is drawing too much current surely due to a faulty impeller. Someone on this forum or Benz World described a reasonably-priced repair kit a few weeks ago. Another member stated they had no interest in restoring pneumatic operation but wanted their roof working. In that case removing the impeller would be a solution.
The pump motor is drawing too much current surely due to a faulty impeller. Someone on this forum or Benz World described a reasonably-priced repair kit a few weeks ago. Another member stated they had no interest in restoring pneumatic operation but wanted their roof working. In that case removing the impeller would be a solution.
Ive removed the pose pump and took it out of its housing . Seeing a fix on the pressure switch about the copper tabs touching. Mine were touching under the adjustment wheel only. Should they be ? the others we’re not touching. Ive attached a picture so it’s the copper tabs to the right in the picture under the adjustment wheel that were touching each other I have since pushed them apart
Member
Joined: Feb 2007
Posts: 120
Likes: 23
From: Aberdeen, Scotland
SL500 2009
The two tabs on the right in your photo SHOULD be touching, that is not your problem.
The tabs are pushed against each other by the white plastic disc (disk) If you have moved the tabs, you can unscrew this disc (after taking note of the position) then straighten the tabs and screw the disc back in.
Your problem is with the motor / pump unit.
The tabs are pushed against each other by the white plastic disc (disk) If you have moved the tabs, you can unscrew this disc (after taking note of the position) then straighten the tabs and screw the disc back in.
Your problem is with the motor / pump unit.
Member
Joined: Sep 2019
Posts: 230
Likes: 87
From: Northwich
R230 350SL
Unsolder the motor connections and look at at the other end of the motor. You can remove some screws and the end cap can be removed to access the impeller. If you get some graphite dust coming out as you loosen the end cap that’s a big clue that the impeller has broken.
If the impeller has gone they are obtainable on eBay. Please note there is a specific way to reassemble, you can’t just bolt it up again. You need to check he pressure it’s delivering by hooking up to a 12V supply and measuring pressure and adjusting the end screws. See here
If the impeller has gone they are obtainable on eBay. Please note there is a specific way to reassemble, you can’t just bolt it up again. You need to check he pressure it’s delivering by hooking up to a 12V supply and measuring pressure and adjusting the end screws. See here
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Member
Joined: Feb 2007
Posts: 120
Likes: 23
From: Aberdeen, Scotland
SL500 2009
If you buy used, who knows what coding you will get, if you buy new the MKL (pressure for the seats) is turned off by default.
So you will need a Mercedes Star system to check and change the coding.
I re-con the units and sell on ebay (UK), attached is the coding that I set for my PSEs.
So you will need a Mercedes Star system to check and change the coding.
I re-con the units and sell on ebay (UK), attached is the coding that I set for my PSEs.
Thread Starter
Junior Member
Joined: Mar 2015
Posts: 28
Likes: 0
From: Maine
2003 sl500
Ok I disassembled my pump and the impeller was completely intact. I did notice some carbon dust on one side of the ports and wonder if a channel is clogg causing the fuse toblow
Member
Joined: Sep 2019
Posts: 230
Likes: 87
From: Northwich
R230 350SL
Member
Joined: Sep 2019
Posts: 230
Likes: 87
From: Northwich
R230 350SL
Thread Starter
Junior Member
Joined: Mar 2015
Posts: 28
Likes: 0
From: Maine
2003 sl500
