Battery for E350

[muller]

My battery went flat this morning. It's been in the car since 2015 and it's Benz brand. What is the average lifespan for these?

[nulu]

5-6 YEARS

[muller]

Okay, I guess it kicked the bucket

[Ivanerrol]

W212 MY 2011 E350 petrol(Gas). Just replaced the battery for the second time (now on it's third Mercedes/Varta battery)

W213 diesel MY2018 (October 2017 car). Original battery down to 57%


Conversely : My MY2004 E211 original battery changed in 2017. They don't make them like that anymore.

[oldsinner111]

last battery i got was from NAPA. cheaper than walmart

[muller]

Just got a new one from the dealer. Installed it and what do you know, the sunroof on the wagon is working again. LOL

[back-seat-driver]

Originally Posted by muller

My battery went flat this morning. It's been in the car since 2015 and it's Benz brand. What is the average lifespan for these?

As with anything else, a lot depends on how you use the item in question.
In terms of batteries, you have to remember how they work. When you first start the car, you are drawing a lot of power, and then the alternator basically takes over once the car is running and ... tops up the battery. I'm being careful to not say charges the battery.

So, in a scenario where the car sees a lot of short trips daily, that battery is not going to last as long as one that sees one of two long trips daily. If you get up, drive two miles to the gym, drive back, take your kids to school, go to the donut shop, stop at the post office, etc and each one of those trips is very short, especially in adverse weather, yeah, your battery ain't gonna last long.


I drove about 15 miles each way to work. The battery in my car lasted 10 years, and that car sat for most of 4 years once a motorcycle took over my commuting duties. It was not a name brand battery, some generic cheap thing, and wasn't the correct size or amperage for my E320.

Even once the car was basically sitting most of the time, i'd start it and go around the block once a week and give her the old Italian tune up once a month The Toyota Corolla sized battery held up for a long time because it rarely did short trips and I lived in sunny So Cal at the time.

[muller]

Good to know.

[muller]

The sucker drained out. Something else is wrong.
I am suspecting the HID that I replaced. Do you all think that could be a possible cause?

[Ferdman]

muller, I would suspect the alternator is not functioning properly. Check the voltage across the battery terminals with the engine running. I have had a similar experience.

[muller]

will do, but somehow I thought it was over 12V. I will check again.

[Ivanerrol]

If the battery is down, the voltage across the battery should be around 14.6 - 14.8 for an AGM battery - with the engine idling.


You will need to get the leakage diagnosed.
If you can't do this yourself then a Auto Electrician will do it.

[muller]

What's involved in an leakage diagnosis procedure? I wouldn't mind trying it.

[l_turn9]

Hey, speaking of batteries; My 06 E350 doesn't get driven much - after it sat for a couple of weeks I checked the battery and it said 12.41v (engine off). But, It starts easily - is 12.41v acceptable?