500E Battery Vent tube routing

[captruff]

I was running an AGM, but decided to run a period Mercedes-Benz lead acid battery. I think I remember taking out the old vent tube and now I don't see where the hole with the grommet is leading to the outside of the car. I also see the battery has a hole for the vent tube at the positive side as well as the negative side.

I have the new elbows #A 000 990 38072 the new clear hose #A 024 997 49 82 and a new block off plug for the side the tube does not attach to A 002 997 24 86

So can somebody confirm which side the eblow and tube attaches to + or -? Additionally, how do I route the vent tube to the outside? Detailed images would be greatly appreciated.

Thanks,

Jeff

 

[captruff]

Update: I think the battery vent tube is vented from the + side and then the tube gets routed through the rubber grommet at the low point in the battery tray area. I'm guessing the hole on the "-" side terminal takes the block off plug.

Anyone able to confirm the above?

Jeff

 

[gsxr]

You can vent from either end of the battery, whichever is more convenient. Plug the opposite end.

The only place for the tube to exit is via the grommet pictured - that's what I would use.

 

[a777fan]

Was the 500 vented from the factory? I know the 400s were not…

 

[gsxr]

Was the 500 vented from the factory? I know the 400s were not…

I'm not sure. I suspect "no"... I've never seen one vented, ever. @Klink?

 

[TerryA]

There’s a vent for the battery compartment in front of the forward end of the battery tray but not for the actual battery. When I had an acid battery I added an 1/8” plastic tube from the battery vent and routed thru the vent to the outside.

A while back Jeff sold me a used battery tray in perfect condition which I installed along with cleaning up the whole compartment. Then I installed a new AGM battery. The AGM battery had a vent also. I would assume that it must vent small amounts of acidic gas also. So to be sure I installed the same 1/8” vent tube as before. It really can’t be seen unless you use an inspection mirror.

 

[luckymike]

Here's how I did it in our E420.

 

[captruff]

Thanks for the help guys. It is installed.


Jeff