This guide provides instructions on how to replace the auxiliary battery on a Mercedes-Benz R172. The auxiliary battery may also be referred to as the G1/13 and its main function is as a backup to operate the ECO start/stop function of the vehicle.
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The auxiliary battery on the R172 is located behind the driver's seat.
I have been working on cars for over 20 years. Over these years I have gained extensive hands-on experience which ranges from repairs such as brake changes, oil changes, spark plugs replacement to strut, engine, transmission, and differential replacement.