W202 Boot / Trunk release

Stevie202

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Hi, I have encountered a significant issue with my much loved 202. It looks like I have blown a fuse, which controls the central locking and boot. The guidance I have had is that the blown fuse is in the boot, which will not open either by the fob, key, or console switch.
I have pumped litres of WD40 into the lock, and to no avail, I can open the drivers door on the blade, and the vehicle will start ok.
Does anyone have a work round to open the boot, assuming the there must be away short of either removing rear seats or drilling the lock?
Help! - Thanks in advance
 

television

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What year is the car please
 

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Yes fuse 2 in the boot fuse block 30 amp


I would try spraying some wd40 to start with in the lock, keep taking the key in and out and see if it will unlock, holding something that vibrates on the key welps
 

grahamcol

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Small point. if it's 1999/2000 it must be a facelift. Facelift came in during 1997 I believe. This probably won't affect the later comments / diagnosis though ?
 
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Stevie202

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No definately pre facelift, 202 was 93/94 to 2000, I believe! :)
 

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There was a change in the wiring during 1999 and some other things
 
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Stevie202

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No, the key dosnt seem to fully engage, works fine on the failsafe for the drivers door, but not the boot
 

Dec

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Just in case your not, put the straw right into the key hole as demonstrated below.
attachment.php

Dec
 

grahamcol

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No definately pre facelift, 202 was 93/94 to 2000, I believe! :)

Yes, the 202 was indeed 93ish to 2000 but there was a facelift around 97. The 202 became the 203 late 2000 / early 2001. I have both versions of the 202.
 
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Stevie202

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Update: All suggested approaches now attempted, to no avail :(
Looks like its plan B and attempt to gain access via first aid compartment
Other slight minor issue is I am now nearly on vapours, as didnt realise the fuel filler was also affected, so an ideas how to easily (not chop) disengage the filler cap pin?
Thanks to all!!
 

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You just have to get in the boot, you cannot open that without destroying it
 
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Stevie202

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UPDATE 2: I now have fully penetration with the key (excuse the phase!), what is the best method to aggitate the rotation mechanism, I see a chink of light, fingers x'ed
 

Dec

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Your key has no handle so use pliers to grip the key BE VERY CARFULL NOT TO APPLY TOO MUCH TURNING FORCE or the key blade will snap, wiggle the key left / right a bit then TRY to turn the key blade to the left to about 10 o’clock position, once the blade has been turned to the left then the lock keyhole can be pressed inwards and the lock will unlock. Be patent with it.

It is now the area inside the Red box in picture below that is still seized, it is almost impossible to get any oil into this area while the boot is closed as the lock mechanism is in the horizontal position so gravity is not working in your favour.

When you get the boot open, flood the lock again while the boot lid is in the fully open position, the lock mechanism will then be in the vertical position and gravity will bring the oil into the area in the Red box.

See also… http://forums.mercedesclub.org.uk/showthread.php?t=53189

Dec

P.jpg
 
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Stevie202

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Bit of clarification please - The push element of the lock is free and the 'button' will actually press in, however the barrell will not revolve in any direction, nor will the boot open. Is the fact that the button can now be depressed a good thing or an added complication if the barrell will not actually turn?
 

Dec

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The push element is and was always present so the “button” being pressed inwards is normal.
The barrel is not revolving in any direction is because the area in the Red box outlined in the above picture is stuck/seized so it wont turn with the key blade, it should but its seized.

The button pressing inwards is normal regardless if the boot is locked or not.

When the boot is locked, Lever B moves upwards so pushing the button inwards wont unlock the boot lock because Lever A will not be struck by Lever B.

Conversely

When the boot is unlocked, in this case when the key is turned to the left (10 o’clock) Lever B moves downwards so pushing the button inwards will unlock the boot lock because Lever A will be struck by Lever B… when the "button" is pressed inwards.

In this case, by turning the key blade to the left to about the 10 o’clock position will move Lever A downwards and so pressing the 'button' will unlock the boot…. your problem is, you cant turn the key as the lock is seized.

Did you try wiggling the key left/right in the lock with the pliers and then trying to turn the key to about 10 o’clock?

Dec
E.jpg
 
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Stevie202

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Yep, tried the wiggle, not sure if the barrel has started to rotate or of the key is becoming loose in the lock. I dont seem to have much more than a few degrees either way, say 5 to 12, to 5 past.
Thanks for assistance, as stated earlier is there anything I can do to alleviate the problem with the fuel filler cap pin?
 

television

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There is no way to get to it without damaging the flap
 

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