My car's start-stop won't work because of a partly discharged battery - would a trickle charger solve the issue?

My 18 month old Mercedes-Benz E-Class won't automatically stop-start anymore due to a partly discharged battery. It's left in my garage for weeks at a time, so it's understandable. I took it for a 120-mile drive, but the battery is still reported as partly discharged. Is there a trickle charger you recommend, and are they safe to leave connected whilst I'm away?

Asked on 29 March 2018 by julesandsand

Answered by Alan Ross
If the car is only 18 months old then I'd go back to the dealership.The most likely problem is the auxiliary battery. See the attached link: www.youtube.com/watch?v=flAzvwoionI

You could use any trickle charger, so it's really is a case of how much you want to spend. If you get a good quality one then it should be okay to leave it connected.
Similar questions
You recommend trickle charging on a hybrid during self-isolation. We've got a Kia Niro, but I couldn't find visible battery terminals. Any idea where they are?
My 2010 Nissan Juke will not start. The keyfob works but the ignition doesn't work at all. When pushing start button as usual, it just doesn't start. What could it be?
I haven't used my 2018 Ford Fiesta for three weeks now and probably won't be using it for a few weeks more. Should I start it up on my drive and leave the engine running to keep the battery charged?
Related models
Beautiful cabin design and quality. Lovely high-speed refinement. Very quiet and staggeringly efficient four-cylinder diesel. Futuristic equipment and more spacious than ever
 

Ask Honest John

Value my car