I want to put an aftermarket lock/unlock remote and an aftermarket alarm in my '93 124 300D.

I know that mercedes used a vacuum locking system on this mode, any idea how much extra it is going to cost to override this system?

Also, what does everyone reccommend for brands/types of remote keys and alarms?

Thanks

__________________
-Sam
93 300D
210k - Sold, but not forgotten.