2012MLBlue

First warning of any kind since new, got a Low Coolant warning on start-up the past few mornings and when leaving the office late afternoon. Decided I better pop into the dealer this morning (conveniently on my route to work). I was in and out in ten minutes as all it needed was a tiny top up (I would say it was 300-400 ml they added (while I watched). No cost.

Good to know I wasn't really low and interesting the system is so sensitive to set off a warning for just a small decrease in volume (likely frigid cold compresses the volume and causes the warning).

AS705

Just had the same issue on 2012BT. Only occurred on extreme cold (-15 Celsius & below) days after vehicle outside. Dealer topped up anti-freeze and recommended install of the block heater cord but would not help because there are no hydro outlets at work location so declined. (Vehicle has block heater pre installed but requires cord installed at dealer)

A second issue was the blind spot assist became inoperative. It required sensors being replaced. Both were no hassle warranty and a great courtesy car was provided overnight (c350 4matic coupe). -Star Dealer - Great customer care MB Barrie

samaritrey

My family's 2012 ML350 Just had the same issue while driving up to ski resort. It looks down by just a tiny amount and within a few minutes TPMS light came on. Going to just dump it off at dealer and have them deal with it... To cold to deal with tire pressures.