E-Class (W210) 1995-2002: E 200, E 220D, E 240, E 290TD, E 300TD, E 200, E 240, E 280, E 320, E 420, E 430 (Wagon, Touring, 4Matic)

Door Locks

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Old Mar 9, 2011 | 01:39 AM
  #1  
banker49's Avatar
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2001 E320
Cool Door Locks

My E320 - 2001 My door locks are not working. My remote will activate the alarm, but the locking mechanism either stays locked or it stays unlocked. Also the trunk is locked and will not open with the remote and will not open inside the car. The rear head rests will not release either. I checked the fuses (41, 5, 19) and the fuses were in good shape. I'm stumbed. What else can it be? A relay? Any insight?

Thanks,
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Old Mar 9, 2011 | 02:16 AM
  #2  
raymond g-'s Avatar
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same insights i gave on the other forum. sounds almost like classic case
of water intrusion affecting the electrics and PSE module. eliminate that first
before moving to other guesses
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Old Mar 9, 2011 | 12:32 PM
  #3  
dsmith's Avatar
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88 535is, 89 318iT
fyi, all of those items are controlled by the PSE pump/vacuum system.
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Old Mar 10, 2011 | 12:15 AM
  #4  
banker49's Avatar
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2001 E320
Cool PSE Issue

I checked the fuses. All signs point to the PSE pump. Is there a fix or direction to correcting the PSE short of purchasing a new pump?
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Old Mar 10, 2011 | 12:46 AM
  #5  
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2001 E320 RWD - Brilliant Silver/Ash: 100,000+
Try cleaning or drying it out. If it was fried it probably would have blown some fuses or tripped a relay.
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Old Mar 10, 2011 | 03:20 AM
  #6  
raymond g-'s Avatar
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used PSE unit will cost you $200+, or $500+ from the dealer. either way,
the car must be recoded to introduce it to the new PSE using the Star
Diagnosis System.
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Old Mar 10, 2011 | 02:12 PM
  #7  
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2001 E320
Thank You

Raymond,

Not the outcome I was hoping to hear, but it is what it is. Thank you for sharing your knowledge. I really enjoy my car and like learning from experts and other enthusists like yourself and others that have posts.
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Old Mar 11, 2011 | 12:23 PM
  #8  
raymond g-'s Avatar
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very sound advice from plutoe
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Old Mar 12, 2011 | 05:36 PM
  #9  
mbon99e300's Avatar
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83 300D TD, 99 E300TD
I have same difficulty with my 99 E300. Don't know the term PSE and where it might be located.
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Old Mar 12, 2011 | 08:45 PM
  #10  
raymond g-'s Avatar
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99 E320
mbo...

Pneumatic Systems Equipment (pump)

you can see this under the rear seat recess next to battery. has plumb-age
leading into it to operate vacuum assisted appliances.

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Old Mar 12, 2011 | 10:00 PM
  #11  
boltonblue's Avatar
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BTW, is there a special secret to changing one of the air lines?
I'm a little reluctant to force them, I don't know the breaking strength of the connectors.
I need to disconnect and reconnect for my door swap.
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Old Mar 12, 2011 | 11:51 PM
  #12  
raymond g-'s Avatar
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99 E320
yes, it can be tricky. check Roman numeral IV....
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Old Mar 13, 2011 | 02:52 PM
  #13  
Fabio D's Avatar
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210 55
Is pretty common find water inside the PSE unit, i see some cases here.. But someone know were the water comes??? i check all the car for water incomming & nothing. but the units are completly rusted and wet

Fabio Daniel
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Old Mar 16, 2011 | 03:50 PM
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2002 E320
My '02 was leaking from the seam under the trim strips on the roof. Had to replace my PSE because, unbeknownst to me, water collected in the battery compartment and the foam surrounding the PSE wicked it up into the unit causing it to fail.
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