bought 1999 S reg s/a a class cant find immobilizer port 2 put my immobilizer key in

[Ali_c]

been a bit stupid needed a car quick, bought the A class(classy) but didnt ask all the questions.Problem The spair key batteries hav had 2 b replaced 3 times all-ready (cr2025 x2)in like 2 weeks not sure y?
I also hav an immobilizer key with the set of keys but i cant see wer the hell 2 put it in 2 stop the alarm wen the central lockin button fails 2 open the car coz the battery (i think) died. please can some1 help!!!!
ive checked all around the sterin wheel cant c the immobilizer port wer it was on my golf

its an A class semi automatic 1999 S reg Avantagrade

i hav the ignition + spair key the immobilizer key & a key i dont know wer it goes or wot it is 4, can some1 help

[tbag21]

The immobilizer fob should fit in a port inside the glove compartment.

[SD1]

Ther is a small socket on the left handside of the Glove Box to plug the Imobilizer key into to stop the Alarm

The Imobilizer key will work 200 times.

Key fob Batteries should last 2 years.