key 2000 E430 sport
 

Hello

Keys open doors and trunk..but don't click in ignition, anyone have solution? tried taking in/out, turning key around, changing batteries no $$'s for big repairs. Please help.

put a trickle charger on the battery overnight to ensure that the car electrical system is
at full strength first.

and/or...
check specific gravity of battery (determines solution strength)
check acid level of battery (if you have std lead/acid design - not gel or AGM)
check voltage of battery (at rest, as well as under load such as cranking)

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