We recently got a flat tire on our diesel Mercedes E250 (Bluetec) so we took it to a local shop (with high ratings, but ratings can be for different reasons) and were told that there was a nail in the sidewall of the passenger side rear tire so that had to be replaced. We have run-flat tires (which the tire shop did not seem to notice, which caused us some concern about their competience, but we were already in the shop and had to find a solution, this being the middle of the country) but were successful in mentioning that to them and they replaced the tire with the Bridgestone DriveGuard which is a runflat tire. Anyway, immediately, we have had this “Auxililary Battery Malfunction” message go off. The car engine stops and starts when idling just fine, and so I was wondering if this can be related to some setting not being switched on/connected when the tire was being replaced. Is it simply possible that this was a coincidence that the Auxiliary Battery got busted at the same time as the tire was replaced? Thank you in advance for your thoughts.