Notices
SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

2003 SL55 PSE Pump...Fixed!!

 
Old 06-09-2011, 10:01 AM
  #1  
Junior Member
Thread Starter
 
Join Date: Apr 2011
Posts: 24
Likes: 0
Received 1 Like on 1 Post
sl55
2003 SL55 PSE Pump...Fixed!!

Symptoms:

Trunk only opened with key
Top won't open...says "Close Trunk Seperator"
20 AMP Fuse located behind passenger seat blown
When new fuse installed, pump runs, then slows down, then fuse blows again

Problem:

The PSE Pump is not being told to stop.

Solution:

1) PSE Pump is on left side of trunk under the roof pump.
2) Remove 4 nuts and rotate roof pump out of the way.
3) Remove sponge covering black box
4) Lift and move black box towards centre of the trunk as wires and yellow tubes will allow.
5) Disconnect the two wiring plugs near the back.
6) There is a small grey recessed clip holding each of the yellow/grey air lines in place. Use thumb/slot screwdriver to hold tab back while pulling to release each air line. Grey line may release pressure when removed.

7) LABEL each air line as removed!!!

8) Black box containing PSE pump can now be removed from car.
9) Use slot screwdriver/hand pressure to "split" open black box. Try to open it slowly as the actual PSE pump is fairly unsecured and will flop out.
10) Remove the 2 grey air line connection hubs by inserting slot screewdriver into the four slots to release tabs.
11) Remove 3 screws.
12) Circuit board now loose. There is a white 3/8" round plastic part attached to copper strip. Beside it is a second copper strip.
13) Look carefully and you will see this copper strip is actually 2 copper strips. Looks like they are there for some option my car doesn't have.

If they are touching each other the pump circuit is closed and the pump will not stop.I sleaved a plastic protector over 1 of these two copper strips to keep them apart.

Pump now operates normally.

If you know what to look and can work with needlenose pliers etc. the copper tabs are visible and can be inspected/repaired without removing the pump from the car and skipping steps 5-8 and 10-12.
iammalibuboy is offline  
Old 06-09-2011, 01:10 PM
  #2  
Junior Member
 
Join Date: Jan 2010
Posts: 43
Likes: 0
Received 0 Likes on 0 Posts
2004 R230 Sl500
Great resolution and write up .
Any pictures ?
Thanks
GET TUBED is offline  
Old 06-14-2011, 08:10 PM
  #3  
Newbie
 
Join Date: Jan 2010
Posts: 11
Likes: 0
Received 0 Likes on 0 Posts
Mercedes Sl500 2003
Thumbs up Nice Post!

I should have tried that too. I bought my pump brand new from this guy instead and now its working... Anyways, ill try to fix my old one and maybe sell it to whoever might need it here.
http://cgi.ebay.com/ebaymotors/ws/eB...#ht_500wt_1182
Adastra is offline  
Old 09-01-2011, 02:53 PM
  #4  
Newbie
 
Join Date: Sep 2011
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
SL500
hello, i took apart the PSE pump and followed your directions is this what you are talking about? I see 2 prongs and one of them has this white plastic thing thats keeping one of the sets together I have a 2004 sl500

eliteproxy is offline  
Old 09-04-2011, 11:27 PM
  #5  
Junior Member
Thread Starter
 
Join Date: Apr 2011
Posts: 24
Likes: 0
Received 1 Like on 1 Post
sl55
SL 55 PSE Pump

Great picture!
My problem was that the pump would not shut off. It would run till the fuse blew. The pump was not being told to shut down. If you have different symptoms, my solution may not work.
There are 2 sets of metal contacts as shown near the left in your picture, one that is in use by the white lifter (if I remember right when the pressure gets high enough the white lifter lifts, makes contact and turns off the pump and a "spare" set (for who knows what).
My spare set of contacts was making contact with each other, which continued to supply power to the pump. The "spare" set of contacts must NOT be making contact with each other. It was a while ago now but if I was guessing I'd think it's the lower set in your picture.
I separated the two metal contacts and sleaved one in plastic, which solved my problem.
There is also a set of 4 identical small doides on the board which are known to fail. Any electronics repair place could tell you if they are faulty.
Good luck!!
iammalibuboy is offline  
Old 09-04-2011, 11:42 PM
  #6  
Junior Member
Thread Starter
 
Join Date: Apr 2011
Posts: 24
Likes: 0
Received 1 Like on 1 Post
sl55
SL 55 PSE Pump Fix

In the attachment I have marked up your picture to better identify the contacts that need to be separated.
Attached Thumbnails 2003 SL55 PSE Pump...Fixed!!-sl55-pse-pump.jpg  
iammalibuboy is offline  
Old 09-05-2011, 04:09 AM
  #7  
Senior Member
 
Television's Avatar
 
Join Date: Oct 2006
Location: Southcoast England
Posts: 379
Likes: 0
Received 0 Likes on 0 Posts
CL500 216
On this thing on these pumps the carbon type rotor built into the pump can shatter when the weather drops to 0c, the reason is that the hole in the rotor is too small, the rotor shrinks and splits rendering the whole pump faulty, it is always this when the pump blows the 20 amp fuse. there are no parts for these pumps.

I can always make up a good PSE pump from a water damaged one, and the broken rotor.
Attached Thumbnails 2003 SL55 PSE Pump...Fixed!!-pse-pump-rotor.jpg  
Television is offline  
Old 09-05-2011, 08:10 AM
  #8  
Junior Member
Thread Starter
 
Join Date: Apr 2011
Posts: 24
Likes: 0
Received 1 Like on 1 Post
sl55
Different Problem

Television...it is not "always" a broken rotor. With a broken rotor I don't think the pump would run, the fuse would just blow immediately. My PSE pump ran for 5-10 seconds before blowing the fuse. The pump was not being told to stop pumping when it achieved the corrrect pressure.
Different problems.
iammalibuboy is offline  
Old 03-07-2012, 12:34 PM
  #9  
MBWorld Fanatic!
 
blueSL's Avatar
 
Join Date: Jul 2002
Location: UK
Posts: 2,397
Received 1 Like on 1 Post
SL55 AMG
Can someone tell me what PSE stands for?
blueSL is offline  
Old 09-06-2012, 10:54 AM
  #10  
Junior Member
Thread Starter
 
Join Date: Apr 2011
Posts: 24
Likes: 0
Received 1 Like on 1 Post
sl55
Second GoRound

PSE Pump failed (blowing fuse immediately). Took it apart, cleaned and lubricated, reassembled....all fine.
iammalibuboy is offline  
Old 02-28-2015, 09:22 AM
  #11  
Newbie
 
Join Date: Feb 2015
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
SL55 AMG 2004
Ebay seller has a replacement (rotor and 8 x blade) kit for SL55 PSE pump

Originally Posted by Television View Post
On this thing on these pumps the carbon type rotor built into the pump can shatter when the weather drops to 0c, the reason is that the hole in the rotor is too small, the rotor shrinks and splits rendering the whole pump faulty, it is always this when the pump blows the 20 amp fuse. there are no parts for these pumps.

I can always make up a good PSE pump from a water damaged one, and the broken rotor.

When my PSE pump failed due to a shattered rotor, I obtained a replacement graphite rotor and 8 x blades kit from ebay seller ... germanpartz1 ...
SL55_AMG_2004 is offline  
Old 02-28-2015, 04:52 PM
  #12  
Member
 
Frank_S500's Avatar
 
Join Date: Aug 2006
Posts: 163
Received 7 Likes on 6 Posts
SL63 (R230), CL500 (C215), SL55 (R129), CE300-24 Cabrio (A124)
Originally Posted by blueSL View Post
Can someone tell me what PSE stands for?
Pneumatische SteuerEinheit
Pneumatic Control Unit
Cheers, Frank
Frank_S500 is offline  
Old 04-23-2015, 12:46 AM
  #13  
Newbie
 
Join Date: Apr 2015
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
2003 SL 500
PSE Pump - reset requred after replacing??

I just replaced my PSE pump and things are still not working as they should be. The trunk will not do a soft close, the locks are still not working properly- the fuel door remains locked and the roof will still not open. It says on the screen to "visit workshop". I pulled all the fuses behind the passenger seat in the console to "reset" and still nothing.
Any other suggestions??
Runner54 is offline  
Old 05-23-2015, 12:07 PM
  #14  
Newbie
 
Join Date: May 2015
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
sl350
sl350 pump

Originally Posted by iammalibuboy View Post
PSE Pump failed (blowing fuse immediately). Took it apart, cleaned and lubricated, reassembled....all fine.


My PSE pump runs intermittently I have taken the "black box" out but not split it terminals look dry and free of corrosion. I can hear something "switching" when I press the door remote. any ideas please?
Bluesl350 is offline  
Old 05-23-2015, 12:40 PM
  #15  
Newbie
 
Join Date: May 2015
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
sl350
thanks will give it a try
Bluesl350 is offline  
Old 04-04-2017, 09:30 AM
  #16  
Newbie
 
Join Date: Apr 2017
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
mercedes sl500
carbon rotor shattered , just one ring.

Originally Posted by Television View Post
On this thing on these pumps the carbon type rotor built into the pump can shatter when the weather drops to 0c, the reason is that the hole in the rotor is too small, the rotor shrinks and splits rendering the whole pump faulty, it is always this when the pump blows the 20 amp fuse. there are no parts for these pumps.

I can always make up a good PSE pump from a water damaged one, and the broken rotor.
I have bought a new pump motor and went to change the carbon rotors over only to find one shattered in about 50 pieces , guess the cold got to it . does anyone know where i can get another rotor ring .

thanks everyone
vantagcars 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: 0 votes,  average.

Quick Reply: 2003 SL55 PSE Pump...Fixed!!


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: