SL/R230: Windshield Washer Reservoir Hose - Purpose?
Thread Starter
MBWorld Fanatic!
Joined: Dec 2005
Posts: 4,057
Likes: 341
From: NJ
2009 SL63 AMG
Windshield Washer Reservoir Hose - Purpose?
New to the R230 platform and couldn't find much in my search. I opened the cap for the first time and found a small-diameter rubber hose with one end secured in a notch inside the reservoir and the other end loose/coiled.
My initial thought is that is some kind of overflow protection but I can't seem to get the full length of the hose into the reservoir as it bottoms out.
Can anyone educate me on what this hose in reservoir is for and if I need it?
My initial thought is that is some kind of overflow protection but I can't seem to get the full length of the hose into the reservoir as it bottoms out.
Can anyone educate me on what this hose in reservoir is for and if I need it?
Senior Member
Joined: Nov 2016
Posts: 271
Likes: 23
From: Kirkland, WA
2003 SL500
New to the R230 platform and couldn't find much in my search. I opened the cap for the first time and found a small-diameter rubber hose with one end secured in a notch inside the reservoir and the other end loose/coiled.
My initial thought is that is some kind of overflow protection but I can't seem to get the full length of the hose into the reservoir as it bottoms out.
Can anyone educate me on what this hose in reservoir is for and if I need it?
My initial thought is that is some kind of overflow protection but I can't seem to get the full length of the hose into the reservoir as it bottoms out.
Can anyone educate me on what this hose in reservoir is for and if I need it?
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
It's a vent hose so that it "burps" out air as you fill the reservoir. It's needed since the filler tube is long and narrow. Without it, you'd have to pour a very small stream of fluid to prevent it from backing up in the neck and overflowing.
