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Wet pse solved

5939 Views 7 Replies 5 Participants Last post by  Avel Du
R170s are known to suffer from water getting at the pse in the boot.


Having suffered this since the start of winter, where removing, emptying (water poured out like pop from a can), dismantling and drying.
Unplugging drain holes and gummi pflegging seals. Twice.


It looks like the cure has happened by luck, plus the above.


Over the holidays I had the top down a few times. This, along with drain holes and Gummiing the seals, looks to have solved the problem.


It's stood in heavy rain and yesterday got driven in hard rain and floods.
The boot floor is bone dry.
There is some residual damp in the boot, but a wipe down and some sunshine 'should' resolve this.


I was at the point of repainting the seal on the boot lid, replacing the main seals and dismantling everything to check for damage elsewhere.


But the SLK has sorted itself.


So if you've a wet pse pump start with gummi, drainholes and operating the roof a couple of times.
Cheapest fix you'll get.
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Have you looked into inverting the pump, just in case ?
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Being new to MB, what is the PSE?
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The PSE pump is the pump located in the trunk/boot that controls the central locking, alarm, rear demister, interior dome light etc in the r170 models and is prone to getting damp/wet and failing if not looked after...
Being new to MB, what is the PSE?

Thanks for asking...
I was sure someone would call me a dunce if I did that..:wink:
Thanks for asking...
I was sure someone would call me a dunce if I did that..:wink:

Well I have a lot to learn about these cars. This is the first MB I've owned and it isn't even running.
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Thanks for asking...
I was sure someone would call me a dunce if I did that..:wink:
Perish such rubbish thoughts.

BTW, what or who is a "dunce"? :grin:>:D:grin:>:D:grin:>:D
Certainly have. I wanted to resolve the leak first.


I had trouble sourcing the vac tube at aquariums, they tend to use a crinkled tube these days. I have located them on the web though.


It's a job for the summer. I don't want to rush it in the cold and wet of winter.


The only concern I have is fitting the unit back in. The anti tow relay gets in the way now and looks to be a pain when the pse is inverted.



Dedgar, there are several good threads about what happens when the pse gets wet and how to fix it. Worth knowing on the R170 older cars.
When it fails you feel the car has been possessed.
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