R129 key remote battery question

[Watchcame430]

Hi all,

The manual shows a different remote to the one that comes with my car.
The key has never worked remotely.

I opened it up and two batteries fell out but not sure how they go back in given the metal strip that sticks out?
I have googled but it's not clear ... Even mercedes pictures are not clear.
Can anyone help please?
Thanks

 

[rmcservices]

Cover shows + at top so it has be
+
-
+
-
Thats the only way two batteries would function

 

[Watchcame430]

I would agree but that metal strip is in the way?
If the second battery goes on top then that is pretty unusual?
Also do these keys flash when used?
Thanks

 

[Dec]

Batteries go in one on top of the other… slide in sideways, both batteries + sign upwards as said above.

Put in new batteries if the haven’t been changed before.
Should look like the video below when the key is view through a digital camera.

Dec
[YOUTUBE]zQhwvjw29NA[/YOUTUBE]

Also synchronise the key after you have fitted new batteries.

 

[Watchcame430]

Brilliant, thanks so much. This has helped no end ... Turns out previous owner had the wrong batteries in there (cr2032)
With CR2025 I am guessing it will all fit nicely. Explains why I was struggling!

 

[Dec]

Not sure which type is correct for your car, the difference between CR2032 and CR2025 is thickness, CR2032 being thicker, do you have a user manual for that car?

Dec

 

[Watchcame430]

Not sure which type is correct for your car, the difference between CR2032 and CR2025 is thickness, CR2032 being thicker, do you have a user manual for that car?

Dec

I do have a manual but the images show a different remote with four batteries which is a bit odd.
The 2032 are too fat to fit in which I am hoping is why it was falling apart and not working. Will pick some up first thing and see. Fingers crossed!