Not sure of the particular application. But most spade lug connectors have a tiny tab bent up just slightly to click into place in the surround. You just slip a small screwdriver, or I use an #11 Exacto blade to hold the tab down while pulling the connector free. You slip the tool in from the front ussually and when the tab clicks down it just releases. Of course Mercedes is never "always". It seems every nuance of these cars are unique. Always, all the same, fits all models, etc. never apply here.
