Join Date: Nov 2015
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In need to know if the ECO has its own battery and where is it located? I don't have a service manual (looking for one) and not familiar with this features configuration.
My ECO hasn't turmed my car off Since I did my service A and the dealer says it's normal. Hmmmm.
I heard of a possible relay problem or a battery problem so I need to look at those areas. My ECO button displays a green light.
Louie, our Eco Start/Stop didn't work for four months last spring. First repair attempt, MB changed the auxiliary battery (as shown in SSBGLA45's illustration), did not fix it. Second repair attempt, they discovered the computer code was wrong, needed to be manually coded, reset didn't work. Has been working since then (knock on wood)...until the current cold snap (Hawaiian style). It takes a lot longer for the engine to warm up to all the presumed parameters Eco Start/Stop will work with.
And if you're wondering how cold is it in Oahu today, when I drove out at 0700 I set the thermostat to 70° and the heater came on (first ever). Actually, on Oahu, some areas get down to the high-50s a few times each year. Two blankets! (Last weekend there was 2 feet of snow on the Big Island summits.)