Water in spare wheel well

[Spudgunandy]

I have a 2010 180b and not had it long so went to check spare wheel only to find two gallons of water no sign of where water is coming in from and it's clean water any ideas

 

[whitenemesis]

Missing floor bung, leaking rear light cluster, leaking rear screen wash pipe, leaking tailgate seal ...

 

[Spudgunandy]

Thanks think it might be rear lights

 

[ChrisEdu]

My W211 used to have a lake in the spare wheel space! Used some black sealant around the boot trim and that seemed to solve the issue.

 

[Benzowner]

Had a W245 180B and had the same problem. From memory, under the spare wheel in the well is a rubber grommet. Leave the grommet in and drill through the centre of it to release the water.

The collection of water is not necessarily a leak, it could be condensation accrual over the years as there is little or no insulation in that area so warm moist air will do it's thing there.