And one more thing...
I just called the service manager at the dealership to inquire about this "drive in" and he told me that "his greeter" replaced the bulb... and it did'nt work... but that the greeter moved it around and it blinked... but then went off. He went on to say that the connection my be frayed and that if I got it to work then good for me.
I won't name the dealer. But I will tell you that if you're driving through PARAMUS, NEW JERSEY and need Mercedes Benz Dealer service, be forewarned... or just keep driving until you hit Manhattan.