2016 w205 C Class start stop function not working after new battery install

[He10JMD]

I believe your car has a capacitor which acts as an auxilliary battery to operate the stop/start system.
Some cars (my E class for example) have a second battery and some have a capacitor.

I would get this checked and think its the cause of your stop/start system being inoperable despite changing the main battery.

This is a useful read.

Mercedes-Benz Auxiliary Battery Malfunction Explained

Are you facing auxiliary battery malfunctions in your Mercedes Benz? Click here to have the detailed knowledge!

xenons4u.co.uk

what he said

 

[wongl]

Thanks for reporting back - great result.