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#1
11-24-2003, 05:41 PM
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trunk won't open
All,
The trunk is stuck on my 84 300d. The button will push in, but the trunk won't open. Have any of you seen this before? Please help. DieselNation
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82 240D - 257k 84 300d - 86k 
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#2
11-24-2003, 05:42 PM
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Is it unlocked?
Are the doors unlocked? (that one got me on my SD)
__________________
past MB rides: '68 220D '68 220D(another one) '67 230 '84 SD Current rides: '06 Lexus RX330 '93 Ford F-250 '96 Corvette '99 Polaris 700 RMK sled 2011 Polaris Assault '86 Yamaha TT350(good 'ol thumper)
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#3
11-24-2003, 05:44 PM
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Doors are unlocked
The doors are unlocked, and the button pushes in freely, but the trunk won't unlock. What type of trouble did you run into?
DieselNation
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82 240D - 257k 84 300d - 86k
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#4
11-24-2003, 05:45 PM
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I'll trade you. Mine won't STAY open :p
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Chris 1985 300SD - 'Grace' (198K mi.) 2018 Honda Civic Sport 2018 Honda CRV LX 2010 Honda Fit Sport (RIP) 2013 Honda Accord Sport (Sold) 1996 Lexus LS400 (Retired) 1995 Ford Contour SE (Retired) 1976 Porsche 914 (Sold) 1972 Datsun 240Z (RIP)
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#5
11-24-2003, 05:52 PM
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I just got confused when I tried to open it with the doors locked. Kept trying to unlocking it at the trunk button. Then got a flash and went up and unlocked the drivers door. Prest-o! Trunk could then be opened.
Dunno. Maybe you've lost vacuum to the trunk actuator, and it's stuck in the locked position. See if anybody else has an idea on this one.
__________________
past MB rides: '68 220D '68 220D(another one) '67 230 '84 SD Current rides: '06 Lexus RX330 '93 Ford F-250 '96 Corvette '99 Polaris 700 RMK sled 2011 Polaris Assault '86 Yamaha TT350(good 'ol thumper)
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#6
11-24-2003, 05:58 PM
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Does anyone know how to check if I lost vaccum to the trunk actuator?
DieselNation
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82 240D - 257k 84 300d - 86k
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#7
11-24-2003, 07:58 PM
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Do a search on the phrase trunk won't open. On page three of the results is a 40-post thread from 2001 initiated by member Kelly Pepper called "82 300SD trunk won't open" Might make interesting reading.
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#8
11-24-2003, 08:15 PM
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Have you tried using the key? One of the keys opens the trunk even if the vacuum has not released it for pushbutton operation. Insert key, turn it (forgot which way) and push while the key is turned.
Ken300D
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-------------------------- 1982 300D at 351K miles 1984 300SD at 217K miles 1987 300D at 370K miles
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#9
11-24-2003, 08:41 PM
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DieselNation
There is something strange about these trunk locks. There is a certain set of circumstances where you will have a devil of a time opening the trunk. Took me 1/2 hour fiddling with mine last summer to get it open.  Seems it happened when the car was locked and I tried to just open the trunk using the key. Is that what happened to you? Now I only open the trunk after I unlock the car.....Good luck
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 1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car"
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#11
11-24-2003, 10:11 PM
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Is there a factory alarm on your car? My 1984 300SD has (had) an ELECTRIC actuator in the trunk lock as part of the factory alarm, in addition to the trunk vacuum actuator. Clicking the drivers door lock repeatedly with the key got mine to unstick and I could open the trunk. Once opened, I pulled the two prong connector to the electric actuator. This was ONLY part of the factory alarm system in my car and may not apply to the 300D 1984. FWIW.
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The Golden Rule 1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)
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#12
11-24-2003, 10:30 PM
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I had similar situation about a year ago. Turned out my trunk vacuum actuator was bad. My trunk has electric lock plus vacuum lock. So I just disconnect the vacuum actuator. Now I can lock and unlock the trunk using the key for central locking system, but the trunk cannot be locked while driving by pressing down the driver side's door lock.
David _________________ 1985 300D Turbo
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#13
11-24-2003, 11:08 PM
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Now this is for the 240d, but do you have two different shaped keys.
Master key, square-headed key works on all the locks, Supplementary key, rounded-headed key works on just the door and steering lock. Just a thought.
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79 240D (no name yet) 203K Miles Maple Yellow 98 2500 4x4 HD Dodge 24 Valve Cummins TD 83 Chevy Van (Dead-Trans. shot)
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#14
11-25-2003, 06:38 PM
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Did you try to unlock it using the key? In my 300D if you lock the trunk using the key it will not unlock again via the vacuum system until you reset the lock position by using the key.
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Toblin '79 300D, "Liesel von Diesel", 235K I kid proofed the house....but they still get in
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#15
11-25-2003, 07:00 PM
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Toblin is exactly right. Nearly every time my daughter uses the key to open the trunk she accidentally locks it with the key and it must be unlocked again, with the key, in order for the vacuum actuator to unlock.
Let us know what you have found out.
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Mike 2000 SL500 22,000 miles 1981 300CD 188,000 miles 1979 450 SEL 266,000 miles 2005 Cadillac CTS 25,000 miles
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