[R129 SL] Leak problem...

[George Simpson]

I looked under my 1990 500SL and the 'outer' drain pipe is the petrol 
(gas) overflow. The larger, inner one is set at the bottom of the shaped 
panel under the battery and has a 'duck bill' rubber in it to allow 
water to escape but not to splash in from under the car in rainy 
conditions.

You should disconnect and take out your battery to see why it is wet 
underneath. Hopefully, the battery casing is not cracked because the 
resultant leak would be acid and would damage the body work. Check the 
duck bill is clear of accumulated dirt and is not perished so that water 
will pass it easily. It could be a leaking rubber trim seal around the 
boot (trunk) lid which is allowing water in and which then finds the 
lowest point and drains out. Check also whether the carpet is dry and 
lift out the spare wheel to see if that well is dry.

Good luck

George Simpson
1990 500SL

gregoiro at weststargroup.net wrote:

> Hi all;
>  
> I see how everyone is so helpful on this list, I thought I would post 
> a little problem myself.
>  
> I have a spectacular 1991 500SL with 38K miles on it, and generally 
> have no problems with it.  However, over the last few days I've 
> noticed a leak
> from  the back of the car behind the right rear wheel (looks like it 
> is right under the battery area).  There are two small rubber 
> hose-type ends sticking out, one presumably is the a gas runoff pipe, 
> but the other is a mystery and that is the one that is leaking. I 
> can't seem to find what this is for and/or where it is coming from.  
> Any ideas would be appreciated.
>  
> Cheers,
>  
> Greg
> West Hills, CA
>  
>  
>
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