It's a quality Sears Craftsman heavy duty meter, but as I mentioned it was only at about 75% charge. The P.O. Said the MB dealer would try fix by selling him a brand new key and reprogram the ECU, EIS, ESL all to match at a cost $2000~$2500 ( maui prices much higher than mainland )
I'm thinking/hoping 1 component like the motor on the ESL has gone kaput and a less expensive option to the dealership mega cost can resolve the issue