S3 is the same a S2 but with updated front wings/mini headlights.
Any auto-electrician should be able to help. Can you open the boot with the remote?
I forgot to mention that my S2 Aero is a U.S. model (if that makes any difference). The keyless remote only has 2 buttons, one to open and lock the doors and the other button, I resume, is to turn on the alarm but it has no button to open the trunk (I would upload a pic of the keyless remote but I don't know how to do it on this forum, maybe somebody can help with uploading a pic). I normally open the trunk by using the button on the dash.
I know that on an older BMW 3 series you can reset the remote but I was wondering if my car uses the same remote as a BMW M62 V8 (which is essentially the same engine as my S2 Aero).
I was wondering if anybody knows if you can can reset the keyless remote on a Series 2 Aero or knows which vendor Morgan uses for the keyless remote/alarm system for central door locking on a Series 2? If I know which vendor then hopefully I can find out if the keyless remote needs to be reset or repgrammed especially after the car battery has been changed.