Infamous electrical connector gearbox oil leak...with a twist - Mercedes Benz SLK Forum

SLK R170 General Discussion SLK 200, SLK 230K, SLK 320, SLK32 AMG

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#1 Old 03-11-2013
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Infamous electrical connector gearbox oil leak...with a twist

First time post so apologies if in the wrong part of the forum.

My 2004 SLK 200k (R170) has developed a small oil leak, two independent autogear box mechanics have confirmed it is the famous electrical connector into the auto gearbox problem.

I have seen from this excellent resource that it is a common problem however when one of the garages tried to carry out the repair/replacement of the connector housing unit they could not remove the old unit - the retaining bolt just turns and turns in the housing. They gave up after 2 hours trying.

Mercedes dealership tried today and had same problem. Both garages have said a new Electric Kit is needed (in addition to the electrical connector) - this turns a c£150 repair into a £750 (with mercedes dealership) - very annoying considering its one bolt.

Before I have the repair carried out (probably not with Mercedes!) I was wondering/praying that someone else has delt with this and been able to remove this bolt and carry out the more simple electrical connector replacement.

Any advice gratefully received. Many thanks.
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#2 Old 03-11-2013
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#3 Old 03-11-2013
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Welcome from New Hampshire, soumds like the bolts are stripped. You might need some lock pliers and pull down while you turn the bolt. You may also need a heilcoil and some new bolts. Hard to tell without seeing them. Good luck.
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#4 Old 03-11-2013
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Welcome to the forum!! Here's my couple words about this connector.
https://www.slkworld.com/slk-r170-cla...tml#post328803
Hope you find smth interesting!
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Welcome from NE England. Sorry to hear about your problems.






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#6 Old 03-12-2013
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welcome and sorry too..

does the bolt move (back out) at all? along the same line, you can sometimes get the tip of a small screw driver (sharpen the tip if you have a spare) under the head, to apply some outward force...then the threads will sometimes catch.


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#7 Old 03-17-2013
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thanks to all who responded.

Had an independent merc specialst carry out a replacement of the gearbox electrics kit, was the only course of action to replace the leaking electrical connector.

He showed me under the car whilst they were halfway through the repair and you can instantly see why the old leaking connector could not be unscrewed. It seems some (insert swear word here!) amateur who owned the car before me had seen the leak from the electrical connector and instead of replacing it just tried to screw it into position even more firmly and eventually just damaged the housing the bolt screws into.

2.5 hours labour, the new ATF, gasket, filter and the electrics kit itself = £540...much better than dealership but leaves a bad taste in the mouth for essentially a £20 part.
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#8 Old 03-17-2013
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Just out of curiosity the bill still seems high, what are you labour rates there. Locally here at the dealership they are $140/hr CND. A private service garage is from about $90 to $110/hr but only a few have the tools and experience to work on MB (and I hate paying those labour rates to train mechanics) I too picked up a used SLK with no prior histoy and are monitoring the forums closely.
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#9 Old 03-19-2013
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labour charge was £60/hour (Canadian$ 90/hour), electrics kit part alone was over £200.
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