Date registered: Jul 2006
Vehicle: 2002 ML320
Location: Portland Area
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The smartkeys have a lifespan... of 80,000 starts I think... after that the key needs to be replaced
Does the key start the car? If yes but does not unlock the car thats the internal battery.
If not... the key is dead... time to replace it
The key, no matter if the battery is dead or not, will be powered from the ring around the ignition slot via inductive energy so you can still start the car if the batteries in the key are dead.
You would have to open the car with the metal key, thus setting off the alarm, but when you place the key in the slot the alarm stops... that is if the car and key can agree on the code set. This cannot be done if the life of the key is up.
2005 BMW 325Ci - Sport, Premium and Cold Weather Pkgs
2000 C230K -- Desert Silver Metallic -- 113,000 miles -- Sold
2002 ML320 -- Alabaster White
1991 300CE -- Blue Black Metallic -- 129,000 miles -- Sold
1981 300SD -- Classic White -- 190,000 miles -- Sold
1977 240D -- Over 300k miles (Wrecked) -- My 1st car
2006 Porsche Cayenne S - Dad's
2004 Porsche 911 Turbo S
Last edited by '91 300CE; 05-17-2008 at 01:29 PM.