Removed flat battery from boot for recharge.Mercedes C200 SEDAN.closed trunk/boot lid. Cannot get in. doors also locked

Did you check the fuse in the boot/trunk mentioned here?

https://forums.mercedesclub.org.uk/index.php?threads/w202-boot-trunk-release.103090/

For wiring, you will probably need a month subscription to allData.com. Check that the boot/trunk actuator is working by wiring directly to 12 volts and removing the connections to it.

https://www.google.com/search?q=mercedes+c200+w202+trunk+switch+wiring+diagram

..

Maybe an electrical fault check with your local Ford dealer

Locksmith !

I have a suggestion to get you past the dilemma: Connect your battery or another 12VDC power source to the CIGARETTE LIGHTER / ACCESSORY outlet of your vehicle, then turn your ignition switch to ON. This should provide temporary power to the vehicle, allowing you to unlock the trunk ("boot" if you prefer). Once you get the trunk open, you'll be able to re-install your battery.

use the key to open boot as long as the locks are there any door will open manually if you have removed the locks on the boot good luck unless you can get through the back seat into boot you have no chance

This could be shorted truck lock switch issue.

This is all the Bentley shows:


Location: Driver's side door trim in storage compartment.

Removing:

- Remove driver's side door trim:
Repair Manual, Body Interior, Repair Group 70 - Unplug connectors.



Carefully disengage catches -arrows-.
- Press switch for interior monitoring and towing protection -1- or trunk release switch -2- out of trim toward rear.

Installing

Installation is carried out in the reverse order.



Remove trunk lid lock.

Repair Manual, Body Exterior, Repair Group 55
- Use a flat screwdriver to pry plastic tab -3- off retaining pins -1-.
- Bend plastic tab fully to rear.
- Pull contact switch -2- first sideways and then up and out of trunk lid lock.

Installing

Install in reverse order, paying attention to the following:

Note:

Make sure that washers are correctly seated between plastic tab and trunk lid lock.

Trunk Lock After Closing
--------------------------
Desc.: What happens to the trunk lock when closing it.

Settings:
Yes: Automatically lock Boot on closing
No: Boot can be reopened using micro switch button located on the trunk/boot

* Trunk Lock After Drive Off
----------------------------
Desc.: Should the trunk be locked at drive off or after 30 sec.?

Settings:
Yes: Trunk/Boot will automatically lock when vehicle increases speed
No: Trunk/Boot will remain closed, however will be in the unlocked
condition if No was selected in the previous option.

* Door & Trunk Unlock at Key Out
--------------------------------
Desc.: When the is removed from the center console should door/trunk
be unlocked?

Settings:
Yes: All Doors & Trunk/Boot will Unlock when the Key is removed from
the Ignition Switch If Driver frequently locked all Doors when
driving
this feature would be beneficial.
No: Doors and Boot will remain in the same condition as they were
prior
to Key removal

* TSL Locking Logic (Theft Security Locking/Deadlock)
-------------------
Settings:
TSL at first Press: Default Setting. All Doors will lock in Deadlock
Mode
TSL at Second Press: All Doors will lock in Deadlock mode at the second
press of the Remote.

* Lock /Unlock Acknowledge
--------------------------
Settings:
None : No acknowledge will be visible
Indicators: Indicators will blink as acknowledge

* Follow Me Home Function
-------------------------
Settings:
Tail Light: When selected Tail Lights will be illuminated
Back Up Light: When Selected Reverse Light will be activated


Tech 2 Body Exterior Lighting & Horn
====================================

* High Beam Follow me home Active Time
--------------------------------------
Desc.: Follow Me Home Active Time can be adjusted between 0- 10 minutes

Settings:
This Feature can be turned on or Off .Yes / No can be selected.
Low Beam Automatic / Low Beam also in Position 0 (light switch)
Yes / No
Follow Me Home Active Time
- Daytime Driving Lights can be activated

* Parking Lights
----------------

Settings:
Act as Lead Me To the Car Light.

* Park Light On Reminder
------------------------
Settings:
On / Off
If Ignition is turned Off and the parking lights are active, Driver will
be warned if set to on.

* Show Trailer Light Outage
Desc.: REC will detect blown trailer light and display on SID

Settings:
Yes or No

* Trailer Light / Fog Light off
-------------------------------

Settings:
Yes: Fog Light Rear will be disabled When Trailer is connected Yes
No

* Horn Lock Unlock Acknowledge
------------------------------
Settings:
On: Horn will honk when car is locked
Off: Horn will not honk if car is locked


Tech 2 Body Locking
===================

* Panic Alarm Activation (Vehicles fitted with /Alarm only)
-----------------------------------------------------------
- Panic Button / Locking Switch
Central Locking Switch Driver /Passenger

Settings:
- Panic Button on Remote and locking switch inside vehicle will
activate alarm
- Panic Button will activate Alarm only
- Locking Switch inside vehicle (driver /passenger will activate
alarm only
- No Panic Alarm function required.

* Unlock Logic
--------------
Settings:
All at first press : All Doors will open & Fuel Lid will unlock if the
Driver or Passenger Door Switch is activated
Driver Door & Fuel Lid at first press : Only the drivers Door will unlock
& Fuel Lid will unlock when door
switch is activated

* Remote unlocking One Press
----------------------------
Settings:
All at first press: All Doors will open & Fuel Lid will unlock if the
Remote is pressed
Driver door & Fuel Lid at first press: Only the drivers Door will unlock &
Fuel Lid will unlock when the Remote
is pressed

your can check is it something stuck in the lock, first operate your roof either way, if you are going to open the roof as a first action boot lid will open to backward, let boot lid fully open and stop operating the roof, ignition off and have a look if something stuck you can see, if you are going to close the roof let close the roof and before close the boot lid stop operating roof switch, otherwise faulty boot lid lock, if faulty lock but you can try by mettle key blade which is in your electronic key, first take out mettle key from electronic key then insert mettle key in to the key hole in boot lid turn fully left and open boot if not work turn fully left and push it in, is this information helped you?

Most likely you have a leak in the system. Start at the pump, removing lines to see where you have vacuum and where you don't.