Can I change the battery myself or have it changed by the dealer for double cost ?

[benzw205]

hello,

Is there any problem or any computer to reset after changing the battery ?

Have you done it yourself or always let the dealer do it ?

Thank you.

 

[bembo449]

none at all , DIY or get a garage to do it for you for buttons

 

[benzw205]

none at all , DIY or get a garage to do it for you for buttons

buttons ?

have you done it yourself on a recent car ?

thank you.

 

[bembo449]

yes , buttons as in cheap ! im a mechanic Sir , so yes I do I few battery changes throughout a year

 

[LostKiwi]

Easy enough to do yourself. Just disconnect the earth first and reconnect it last. After you will need to reset the windows (push the button to take the window down, hold for 5 seconds then put the window up and hold for 5 seconds - repeat for all windows). The steering angle sensor will also need recalibration - just drive it and move the steering wheel more than 10 degrees left and right and the ESP/ABS lights should go out. You may need to turn off the engine then turn it back on again.

 

[L John]

Easy enough to do yourself. Just disconnect the earth first and reconnect it last.

I've seen people do exactly as you said and then they recheck the positive with the spanner again after both have been connected. D'oh!

 

[LostKiwi]

I've seen people do exactly as you said and then they recheck the positive with the spanner again after both have been connected. D'oh!

Nice firework displays I bet!

 

[L John]

I have seen it but usually just nipping up there's not much movement of the spanner so when they get away with it, they argue it's fine.
The only times I've seen people weld unintentionally with the battery is when they nip up the positive with a ratchet. Much easier to flip it back and hit metal than when using a spanner.

 

[John Laidlaw]

As above easy enough really- last two I’ve done haven’t needed any window/sunroof reset or steering which was a bonus

 

[LostKiwi]

I once managed to catch a metal watch strap between the positive terminal and the body. That generated a few sparks (and even more expletives!)

 

[benzw205]

Easy enough to do yourself. Just disconnect the earth first and reconnect it last. After you will need to reset the windows (push the button to take the window down, hold for 5 seconds then put the window up and hold for 5 seconds - repeat for all windows). The steering angle sensor will also need recalibration - just drive it and move the steering wheel more than 10 degrees left and right and the ESP/ABS lights should go out. You may need to turn off the engine then turn it back on again.

Thank you so much for the clear explanation.
But do you know the reasons why we have to reset windows and steering when changing battery ? Nothing wrong can happen when doing it ? Thanks again.

 

[LostKiwi]

The reason is simply the car forgets when power goes off. It's a simple procedure to reset.

 

[oigle]

If your radio is coded, you will have to reset that too. If you have lost the code, beware....needs to have a permanent power source connected before removing the battery.

 

[LostKiwi]

If your radio is coded, you will have to reset that too. If you have lost the code, beware....needs to have a permanent power source connected before removing the battery.

Pretty certain that's not an issue with a w205.

 

[benzw205]

If your radio is coded, you will have to reset that too. If you have lost the code, beware....needs to have a permanent power source connected before removing the battery.

Thank you, but what does it mean when a radio is coded ?!

 

[John Laidlaw]

Thank you, but what does it mean when a radio is coded ?!

Some older cars have a pin code on the sound systems so that if they were stolen from the car, without the pin would be useless.theft deterrent. Newer stuff is built in so doesn’t need it.yours is a new model so nothing to concern about

 

[EXMERCTECH]

If your cigarette power socket is live all the time.
I.E. Doesn't turn off when you take the key out.
Get yourself a memory saver. (Halford's etc)
Simply plugs into the power socket and is attached to a small Battery PP3 9 volt.
Keeps enough power whilst you swap the battery over.

When swapping the battery over make sure a window is open or the keys are not in the car.

 

[thebiglad]

I thought I'd read somewhere that if you change the battery on a Mercedes, you have to code the battery to the car ??? Perhaps this is just for service history purposes ???

 

[Wighty]

I thought I'd read somewhere that if you change the battery on a Mercedes, you have to code the battery to the car ??? Perhaps this is just for service history purposes ???

I would doubt that buddy , because any make battery can go in a Merc if it's the right spec

 

[brick10]

My local indy does it free, and disposes of the old one.