The boot wont open neither by the button inside or the remote

For safety reasons most trunks/boots open from the inside. Check your manual. If no manual. Email manufacturer.

Hi Peter, In most cars the middle part of the back seat comes down and there's a latch or handle just inside the boot, Good luck mate.....CHEERS..

will glass pop open with remote or key ,whe nyou turn handle if so you may need to remove tailgate trim panel to acess handle assy so you can open it by moving lock rods inside tailgate panel

Visit an on-line parts supplier and purchase a new switch/touchpad for inside of the rear handle. Local parts supplier probably won't have it. You can replace it yourself. I did when I owned one of these part pits.

Have you tried your spare remote, it may just be the remote button is defective. If no then the electric latch motor is defective or some how jammed

Most likely needs to be re matched to the car.

Two bits of info off the net for you

C CLASS (1993-1997), E CLASS (1995-1997), SLK (1996-)
Procedure
1. Point the remote control at the receiver - this should be located in the driver's door handle or next to the boot lock button.
2. Press the lock/unlock button.
3. Within 30 seconds manually lock or unlock the vehicle using the passenger's door lock or the boot lock.
Alternative method
Procedure
1. Point the remote control at the receiver - this should be located in the driver's door handle or next to the boot lock button.
2. Press the lock/unlock button.
3. Within 30 seconds, switch the ignition ON.
Alternative method
Procedure
1. Point the remote control at the receiver - this should be located in the driver's door handle or next to the boot lock button.
2. Press the lock/unlock button.
3. Within 30 seconds, turn the ignition switch to position II.


and

1. Place key in ignition lock and turn to position 2 [all ignition lights on]
2: Turn key to off position and remove from ignition.
3. Within 10 seconds:
3a: press the Close [Lock] button and hold it down
3b: while the Close button is still depressed simultaneously press the Open [Unlock] button. Press and release the Open button 5 times [still holding the Close button down]
3c: Release both the Close and the Open buttons at the same time, and immediately push any of the two Open buttons once [i.e. either the Open doors or the Open Tailgate]

This information is for the resetting of a previously synchronised key to match the security system after batteries have been removed or replaced. This information does not work with new keys which it seems must be taken to a person with a key synchronisation device [or a super-ripoff-expensive MB dealer]

hope this helps

have somebody pull up on the trunk while you press the button inside

The opening of the boot by key or remote is done via an electric motor,you may have a faulty motor or you may have water ingress through the boot handle which has corroded the terminals, this is quite common.

you need to fold down back seats and remove boot panel from inside {bring torch} then pull on little bars that connect to door lock one will click then you should be able to pull the handle and open the door.

We had a similar problem with a 2008 right hand drive 407;ST HDI Touring. Suddenly the remote would not lock the doors and whenever you drove over 20kph then back under it would keep trying to lock itself. Anyhow after a thorough reading of the manual we discovered that the car will only lock if all the doors are closed properly. What we didn't realise is that the glass panel in the boot lid will also open outward like a flap, to allow smaller parcels to be placed in the boot without having to open the larger boot lid. We owned a Mercedes 300TE which didn't have this feature so didn't think to look for it. This was not closed properly. The handle/release must have been knocked when washing the car. Anyhow, once it was firmly shut everything went back to normal. Good as new.