I have a 2002 CL500 located in California. Recently, I found the car battery dead. Since it was 8 years old, I just replaced it - with a Bosch battery of equal rating from Pep Boys. However, the problem did not go away. It has happened 4-5 times now. It has been in the shop 3 times, for a couple of days each, and they cannot find anything. (They attached a network monitor for a couple of days but nothing turned on.) Today is Mon. I last got the car back from the shop last Thurs. The car sat in my garage Fri Sat and Sun. On Fri, we popped to doors a couple of time to see that the power was still there. On Sat, I started checking battery voltage: 12.46V in the AM and same in the PM. On Sun, I noted a drop in V, to 11.5V in the AM. An hour later, 10.5V. Then 9V. I inserted an ammeter in the negative connection without breaking the circuit - and measured 1.7A-2.7A. Normal dormant current is 30mA or less. I saw the battery drop to 7.6V over a couple of hours before I disconnected it from the car. Has anybody seen this or does anyone have a suggestion?