QUICKSHIFT

I always drive with the speed showing in the centre of the speedometer. I also have been using the radio more recently. When I start the car, the display sometimes reverts back to mileage / distance traveled. After a few minutes of driving, the radio switches to my ipod. I've also noticed that it stays in D6 longer than I'm used to ( possibly a warm up step). The car is a 2014 E350 4matic. I bought the MB extened warranty. The car just turned 80,000km. I'm assuming it's time for a battery. The AUX battery was replaced when I bought it in Apr of this yr.
Thanks

Mud

I'd suggest making that ELW work for you, take it in for a diagnostic test before thinking battery.

QUICKSHIFT

I intend to after the holidays. I just wanted a general concensis before the dealer tries to sell me a new battery.

raja777m

Use the 150 off of 300 or more, it expires end of this year. I'm not using mine, I can share if needed.

Diagnostics is around 130$.
If it turns out to be battery, and you agree to buy that at the dealer, they can adjust that diagnostics amount towards the battery along with the 150$ discount right..! Just my 2cents

MBNUT1

Good recommendation

ygmn

I doubt battery

dacia

I have exactly the same car, save for the 4matic system, and my battery has been dying.
I bought a battery tester off Amazon for about 50 bucks and it shows that my battery's SOH (State of Health) is about 20% which seems to be correct as the charge level, voltage, in the morning is around 12V even though I drive the car every day between 50 - 80 kilometers, including short highway stints.
I have been putting the battery on a charger overnight lately, still in the morning the voltage is not above 12.2V.
During cold start the battery voltage drops down to about 9.8V, the car starts fine though, morning temperature where I live is around +5C, about 40F.

So, at least for me it's time for a new battery, it is 5 years and 5 months old, the date of manufacture is stamped into the negative terminal, 13/08.
I checked my wife's car's battery with the same tester and it shows it is in perfect health, which it should be as it is only about two years old and the car is driven regularly.
So I presume the battery tester is working fine.

Have yours tested, it should be free and then if needed get a new battery.
I used the same as what was in the car Varta Silver Dynamic AGM 580 901 080.

QUICKSHIFT

As far as the offer of the discount coupon, thanks. I don't think the coupon is applicable here in Ontario. I don't see it offered through any of the dealers . I do have the equipment to check the battery. I will probably do some diagnosis myself before I contact the dealer. Just looking for a starting point.