Thanks for the suggestion. I do plan on getting another key eventually (probably when it's too late).
The main issue is that my key is not RF it is an infrared one, so you have to point it at the rear-view mirror for it to work, which means being fairly close to and having direct line of sight with the car. It also will not work with the SmartTop that I have yet to install (it's sitting on my shelf of 'to do' items).
would have worked perfectly but as previously stated I think they are out of business as they have been away on eBay for over a year now and do not answer their phones.
What I need is an aftermarket alarm that will take care of locking/unlocking the car, that will also allow remote activation of the roof via the SmartTop. I can then use my key(s) to start and drive. The added benefits of an alarm are an extra immobiliser and a siren which my car lacks.
I'm sorry to say it, but I disagree ..................
I have never seen an aftermarket Alarm which will integrate with MB C/L as it is Vacuum Operated by a PSE Unit which is an integrated system with the MB Alarm.
What you actually need is to fix the underlying problem .............
Also, although I am not fully familiar with the early Cars like yours, I have personally never seen one without a factory Alarm System, (ATA), so perhaps that is what needs fixed
Finally, and again, only AFAIK
, but R170 Keys work on RF, there is no IR in any I've seen, IR didn't come in until DAS 3 Keys, and even then they used RF for locking, and IR for Ignition EIS and Global Close functions by pointing at the Door Handle Receivers, but no R170 has DAS 3, all are DAS 2.
If I am wrong on any of the above I hope someone like @efair
etc can correct me, and apologies if so
HTH, Cheers Dave