urgent help needed

[benz_300se]

hello guys.

i am trying to resolve the problem with my new 94 s420 that i recently bought a couple of days ago and is giving me an alarm starting issue.

the previous owner i bought the car from it didnt have the remote key just the master key ( thats how i locked and unlocked the car by puting the key in the key fob). so yeah anyway i went yesterday morning to unlock the car an all in the sudden when i open the driver side door the alarm went off and crazy along with siren horn. i am like what tha the hell .. so i jump out again and i try to lock and unlock the car again by puting the key in the fob and see what it does. but nothing the alarm still going on and on beeep beeep-beeep-beeef and the headlight and four way flashers go went on also. i try to start the car it wont let me to. my neighbors going crazy so i had to cut the horner( siren) on it and now just the headlight and tail lights flash when the alarm goes off. so yeah i been back and forth up and down for 36 hours already and nothing is improving. i ordered an infrared remote key from the delaer and picked it up today. the dealer told me to synchronize it to put in the ignition and press the button hold it and with in 5 seconds start the car. still nothing happens. i can not get my benz to start because of the alarm. i tried many procedures by puting the key in 1st position waiting 30 sec and so 2nd position 30 and removing the key from ignition waiting 90 sec and so and so... also i tried the neutral thing by pressing the brake and puting the car in neutral but nothing happened. also took fuse # 2 and # 15 out and also disconected the negative battery cable for an hour and still nothing. the only thing i hear is in the back seat right side i hear like click click relays and stuff. i also unpluged the pse vaccum pump under the rear seat and also the alarm relay in the trunk under the fuse box and no luck. please help what do i need to do i have the master key and the infrared remote key ( which got it today from the local dealer). also something else i noticed is i can lock the car from the all 3 points ( driver trunk and passanger side and what i see is the flashing red light in the driver side and trunk only, after then when i try to unlock nothing happens i can not unlock it with remote but the green lid light only flashes in the passanger side and no where else. also tried by pointing the remote to teh rear vie mirror press twice and try to start the car no red or green light flashing the rear view mirror lid eye. can anyone help i think my car has went in the alarm anti theft mode and in a high risk and i dont know what to do to it. is there a way to do a complet reset to the alarm system or the anti theft.

thanks for any advices..