Thanks, Matt, will do. I've pulled the dash apart.

I pushed the light switch plunger in and then pulled it back out. No joy, I will replace it as soon as I get the part. I don't feel bad replacing it since it seems to be a 'consumable'.

I may call me independent MB Tech to get a read on the modules. Also considering a Carsoft reader. I'll start with the switch, the car is functional.