Have Mercedes Questions? Ask a Mechanic for Answers ASAP
Hello my name is***** am an ASE Master Technician and I am glad to help you out with your question.
When you installed the new battery are you sure you did not reverse the polarity of the cables?
Disconnect both battery cables (positive and negative) and hold them together for 15 minutes. Then reconnect one at a time, positive first then negative. This should reset the system.
I am thinking the computer lost the info from the key, do you have another key you can try?
This may have to be taken to the dealer to diagnose. They need to scan it for codes. Make sure to check all fuses as well.
A mobile locksmith may be able to program the key if they have the right software.
Check the aux battery that is in the front passengers side engine compartment near the firewall. Make sure this battery is not dead.
Hello again Dan here,
I am contacting you because the post has not been closed or rated.
This question is coming up on 7 days which means it will time out and close.
You have already paid to get this question answered, but you have not rated.
Let me help some more. Is there anything else I can help you with?
If I did not give you 5 star service, please let me know what I missed.