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Registered 2002 SLK 230 R170
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355 Posts
Hi All,

Now that you have finished using Gummi Pflege on your vehicles I would like to remind you about Water Drain blockage.

It can cause problems in many & various areas.

I've dug out the links detailing the position of the Water Drains for each Model - :grin:

As a result of personal experience I have also suggested that you take off the wiper trim panel.I found a small handfull of vegitation in there.
See note's at the bottom.

R170


Drains, front and rear

SLKWorld http://www.slkworld.com/slk-r170-class-diy/22171-drain-points-locations-tips-cleaning.html

BenzWorld Blocked drain hole - Mercedes-Benz Forum

Clean Pollen Filter & Heater Air Intake Panel (Just under the front edge of the bonnet) Leaves & crud seem to gather here.

R171

Drains, front and rear
SLKWorld http://www.slkworld.com/slk-r171-class-diy/105562-drain-holes.html photos of drain areas in the R171 (Part way down Thread)
SLKWorld http://www.slkworld.com/slk-r170-class-diy/22171-drain-points-locations-tips-cleaning.html
SLKWorld http://www.slkworld.com/general-modifications-r171/13260-mesh-keep-leaves-debris-out-cabin-fan-intake.html
SLKWorld http://www.slkworld.com/slk-r170-general-discussion/88594-ac-evaporator-drain-location.html
(R170 Similar)

R172
Boot drain
SLKWorld http://www.slkworld.com/slk-r172-general-discussion/44641-water-boot.html

ALSO


The box that holds the R172 battery can fill with water.
If it does, the water will overflow into the car and on to the heater fan/blower as the box is also the air intake for the heater/aircon system.
The drain is at the very front of the battery in the middle, you will be able to find it with your finger. Sticking your finger down it will probably unblock it.
You only need to lift the bonnet and take the lid of the battery box to check.


OTHER WORK YOU CAN DO -

Remove Wiper Trim Panel and clean area behind. Dab of grease on loints of Wiper Mechanism whilst you have access to it.

Procedure for R170. R171&R172 Should be similar but I can't find a direct reference to it.


1 Remove wiper arms
2 Unscrew 7 screws (1)
3 Remove cable strap (arrow) in center area
4 Lift air inlet
5 Separate coupling (2) of the washing nozzles
6 Separate electric connector (3) on the printed circuit board (4)
7 Remove water hose and electric wiring through side opening at air inlet
8 Remove air inlet 9 Install in opposite order




 

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18 Posts
Spent today cleaning out all the drain points on the wife's SLK. Very satisfying to do seeing all the crud fly out when the compressed air was applied to the open end. The battery box was actually very clean apart from some leaves behind the battery so having cleaned those out, I fabricated the expanded metal mesh guard and fitted it to the fan inlet.
I used the compressed air gun to clear leaves and muck out of all sorts of nooks and crannies in the engine bay which, again, was very satisfying to do. I finished off by removing the plastic grilles and giving them a good clean up, leaving them looking very smart.
Not much else needs doing on the car now. It's been fully serviced, deep cleaned inside, out and underneath, all seals scrubbed and Gummi Pfleged, bonnet and boot struts replaced and battery revived, so time now to do my cars! :)
 

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Premium Member 2005 SLK55 AMG
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11,404 Posts
NOTE:-
The link to click is the topic title AFTER the http://www.slkworld.com i.e. Drain Points, Drain Holes etc.

The http address will just take you to the forum front page. :tu:
Good spot Myk... I edited the original post to remove the auto-links to the SLKWorld home page, to avoid any confusion.

Thanks
Dave
Moderator
 

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Registered
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20 Posts
drainage

Thanks for this info - my battery well was half full of water, and just as you said - stick a finger in, and that cleared it. (followed afterwards with one of the wife's knitting needles to be sure - but don't tell her :wink:

Same with the wiper tray as well - it was blocked.
Thanks for the guidance..

Not sure if its related, but the heater blower has stopped working. Booked in next week to MB to get it fixed..
 

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Super Moderator UK SLK 55 AMG 2007
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26,238 Posts
The wiper tray blockage has probably let water in to the blower.
Thought this was fixed for the 172s. It was common on 171s.
 

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Registered 2012 SLK250 CDI
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153 Posts
Still the same on the 172, noticed mine was blocked on the passenger side last week and the wiper shaft seal was under water.
 

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Registered
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20 Posts
Drainage

Mine was in for a service just a couple of weeks ago and the battery well must have been half full of water and they never noticed. I doubt that checking these drains isn't part of the service.. or it was ignored, one or the other..
 

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Noticed a sloshing noise on cornering vigorously and then silence from the radio - no noise at all. All the better to hear the sloshing noise! Quickly whipped the battery cover off and the battery box was ¾ full of water and it had slopped over through the fan housing and into the passenger foot well. The lack of noise from the radio probably means the HK amp is fried [anyone got a spare to try?]. Am currently running a dehumidifier in the car and have pulled over a pint out overnight. The battery tray was quickly drained with the judicious insertion of a finger in the drain hole - took a picture to show the location of the drain.

Thought if the battery drain is blocked then the others will be too. So pulled the wipers off [well driver side very firmly stuck so worked around that by taking fuse box cover off] then took off the black plastic shroud under the windscreen [simple trim retention clips - lift the centre part and the entire clip pops out - don't forget the 2 tiny ones on the A pillar]. Once out of the way I was confronted with the attached! Hoovered up the leaves and general detritus and refitted the shroud.

Then took off the wheel arch liner and poked my finger up the drain tube behind the wing [on the R172 these are hard but flexible plastic so can take a fair bit of abuse ] then flushed down through the top funnel and a shed load of gunk poured out the drain tube - free flowing now. There is no drain tube on the passenger side [UK] on the R172 only the battery drain. The central one didn't get done as I ran out of light - a job for next week end along with the rear drain tubes. Hope the photos are useful to someone.

Ian

IMG_5575ac.jpg IMG_6532ac.jpg IMG_2378ac.jpg IMG_3488ac.jpg IMG_3825ac.jpg IMG_7519ac.jpg IMG_7849ac.jpg
 
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