MEMS 3 sounds like the Rover system as used in some Land Rovers and, strangely, Morgans that came to this country around 2000 with the Rover V8 engine. We used to do some of the service for a local dealer who is now defunct, but I recall the MEMS 3 system reader. Who knows? Find a Rover or Morgan dealer and give it a shot.
Motorbill
From Lola to Land Rover, If it's British and has wheels, it's likely I've bloodied me knuckles thereupon