This is so simple, it hardly warrants the time and bandwidth.
If you can change a lightbulb, you can do this maintenance on your Smart ED.
First you need the new part. It is "A 789 340 33 00" available online or at your local dealer.
I paid $36 CAD for it, some have reported slightly more or less, but not a horrible screwing.
Check the expiry date on what you buy, they have a shelf life of about 2-3 years it seems.
here is what I got.
![Image]()
I suppose it makes some sense to do this on a dry day, to reduce any humidity that might enter the battery during the 20 seconds that the old one is out.
here is what you need to do the job
you can try to find the giant torx socket, (my T70 is too small, so probably a T80) or use a 9/16 hex socket or allen key 14mm will do too
a light (maybe it is so easy you could do it blindfolded) and have some scissors handy to open the new cartridge.
below is my old one, empty wrapper and the tool I used.
![Image]()
To find the location, look under the car ahead of the rear wheel on the passenger side (RHS) my car is a North American LH drive car.
here I am ready to go.
![Image]()
Here is what you see under the car, I took a before and after photo, but they are identical
![Image]()
and here is what you will see when you unscrew it. Note two things:
![Image]()
there you have it.. unscrew, - quickly unwrap the new one, and screw it in.
There could not be anything easier.
top up your windshield fluid and you have done what the dealer does for 200 dollars (well they do a battery test I think - for some people)
If you can change a lightbulb, you can do this maintenance on your Smart ED.
First you need the new part. It is "A 789 340 33 00" available online or at your local dealer.
I paid $36 CAD for it, some have reported slightly more or less, but not a horrible screwing.
Check the expiry date on what you buy, they have a shelf life of about 2-3 years it seems.
here is what I got.
I suppose it makes some sense to do this on a dry day, to reduce any humidity that might enter the battery during the 20 seconds that the old one is out.
here is what you need to do the job
you can try to find the giant torx socket, (my T70 is too small, so probably a T80) or use a 9/16 hex socket or allen key 14mm will do too
a light (maybe it is so easy you could do it blindfolded) and have some scissors handy to open the new cartridge.
below is my old one, empty wrapper and the tool I used.
To find the location, look under the car ahead of the rear wheel on the passenger side (RHS) my car is a North American LH drive car.
here I am ready to go.
Here is what you see under the car, I took a before and after photo, but they are identical
and here is what you will see when you unscrew it. Note two things:
- the part you see under the car is the actual cartridge, it looks like you are removing some sort of plug that covers the hole to allow access, but the actual cartridge includes the threaded in cover.
- the new cartridge come with a rubber washer, my photo below shows that my cartridge came out and left the rubber behind. I had to use my finger to pull the old seal out, don't forget this, I don't think doubling up on the rubber is a good idea.
there you have it.. unscrew, - quickly unwrap the new one, and screw it in.
There could not be anything easier.
top up your windshield fluid and you have done what the dealer does for 200 dollars (well they do a battery test I think - for some people)
