why would you want to?.... i think at least the bumper would have to come off or maybe you can get to it from the wheel arch....and then the cost of the container and electrics [?]


might be some info in the WM re fitting.. ... - .- -.




Y. O. L. O.
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I looked into this and decided it was not worth the cost/effort for me.

In addition to the additional bottle you need the matching main reservoir which has the connector for the pipe from the additional reservoir. Cost of new parts would be about £280, the parts can be found secondhand for less than £100 but the challenge is finding the correct main reservoir. (there is one on eBay for £64 at the moment), strangely the secondary ones seem quite common.

To access the main reservoir the wheel arch liner needs to be removed and the front grille needs removed to access the fittings for the front reservoir.

Thanks for that, I guessed it was a tee, so it goes to the main tank.
Can you send a link of the main tank?

p38arover wrote:

That's the problem with living in the grimy UK, you need a big washer bottle. I fill mine maybe once every 6 months.

Hmm, maybe with a bigger one, I'd only need to top it up it once a year.

I guess its a problem in the Dusty Australian Outback as well  2018 SE SDV8 4.4 Byron Blue

item eBay Item No. 184055058817
The pictures for items eBay Item No. 294682769931 and eBay Item No. 154565900230 clearly show the pipe into the top of the reservoir that is fed from the front reservoir.

Thanks for that, perfect.
I must fill every week with our lanes here.
Something I will look onto

This is the position of the extra bottle:

My 2017 has 2 fillers as I found out a couple of days ago when the fluid low warning came up. I don't know if I have the larger capacity. 2017 5.0 Autobiography Supercharged
2005 Merc SL350
2005 Disco HSE 2.7 oil burner