Seen discussed, havenít seen resolution - Mercedes Benz SLK Forum

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

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#1 Old 2 Weeks Ago
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Seen discussed, havenít seen resolution

My 2004 SLK320 is having the issue where the small back windows won’t come up. I’ve torn apart the car checking all of the switches, installed a new rebuilt pump. Pretty much have done everything that I have read. The rest of the steps work fine. About the only thing I did not do is change red control switch. Figured if everything else is working, that shouldn’t be the culprit. I found a small unplugged wire harness back at the hydraulic pump. I see no place it plugs onto, thought maybe from old CD changer.

Any suggestions?

One more thing, about two years ago I fixed the roof actuator, it’s been fine, however, it almost seems it doesn’t come to a full lock after hitting the two micro-switches. Is this something that needs adjusting? Or is it normal. After the roof switches activate and the back windows do not come up, the roofline actuator just slowly lets go back to open position.

Didn’t mean to be long with post....
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#2 Old 2 Weeks Ago
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Did you also check the steel cables on the window mechanism?
They can become frayed and snag.


Also, if you look at the procedure for manual raising/lowering the roof,
there two other cables that can be used to pull the roof into place.
Check they are not snagging and preventing movement.

Other than that it is back to roof tree.

One more thought.
When you close the blind inside the trunk (the one that has to be closed for it to work)
they operate micro switches as well.
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#3 Old 2 Weeks Ago
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You have probably perused these, but won't hurt to post.

https://www.slkworld.com/slk-r170-cl...ostic-aid.html

https://www.slkworld.com/slk-r170-cl...olve-them.html

https://www.slkworld.com/slk-r170-cl...leapyfish.html


Again, probably asking the obvious but..
You have closed the pressure relief valve on the pump?
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#4 Old 2 Weeks Ago
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Wow, lot of good info here, I was really stuck as to what direction to move in. Guess i’m going to have a busy night in the garage. Thanks all, I’ll post a follow up.
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#5 Old 2 Weeks Ago
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Hi,

I'm no VR Expert, but have fixed a couple when giving grief

So don't take this as gospel, but ........................

I'd say that wee plug may be from a Microswitch on the Right forward trunk lock if it has one, and if it is, and the VR Module does not see these as locked, it may well not move to the next phase and lift rear 1/4 windows ????????

If all else fails worth a look whilst you're in there.

HTH, Cheers Dave
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#6 Old 2 Weeks Ago
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If you have removed your headliner, and you can see the rotary latches turning, but you suspect they're not turning far enough to close the two switches, you can disconnect the switches from the harness and insert a jumper to see if that's the problem. The jumper simply simulates "both closed".
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#7 Old 2 Weeks Ago
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So you can't raise the small rear windows? Hydraulics are not involved, there. They are motor driven. Because BOTH don't work, it is very unlikely to be a slipped cable problem. The power to them comes through a seperate fuse to the rest of the roof. Fuse 24, I think, but check that. I think that it might have blown. You can access the connector(s) to each rear window fairly easily. Seperate the plug/socket and give an independent power supply to each window. Reversing the live/neutral reverses the direction of travel to the window. So you can very easily determine where the fault is. I've done these checks so many times in my efforts to independently control those rears. It isn't difficult.

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Good suggestion David.

I don't have much of an update...
However, I think I have pulled apart every bolt, cover, cable and plastic trim that I ever thought I'd do in my lifetime. Meanwhile, the BAS/ESP Light and the SRS light have come on. The BAS/ESP is an easy fix, the SRS light I'm having difficulty finding a solution. Actually, that is how I ended up here now, looking for some helpful advice from you fine folks on these boards.

I just have a gut feeling it has something to do with the roof not latching properly to the windshield (or as a lot of you say "windscreen" ). The one positive thing, the TOP goes down just fine, so nothing stopping me from getting some wind therapy!

There was something in the original post I forgot about, there's a two-wire wiring harness that is just hanging there, over by the hydraulic pump, do you suppose it's just leftover from where I removed the BOSE cd Changer?

Thanks, guys!
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Hi,

If that is where the CD Changer was then I'd say that is a certainty they are the plugs for it.

Your SRS light will not reset in a million years without using SDS / HHT or at very least a half decent Machine which can access SRS Module.

Check codes first, you may have disturbed some wire plug etc

HTH, Cheers Dave
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CD Changer:

bl/sw = Blue/Black - wake-up
br = Brown
sw = Black
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So I bought a new scanner today I never opened it, Actron CP9600, itís a Bluetooth/iPhone scanner. After the reading reviews, nah, not for me. It seems after you pay the $100 for the unit, you are nickel & dimed to retrieve the info YOU NEED. The store told me I canít return it, because itís an electronic product. Trust me, I will get my money back. UNOPENED, give me a break. I just ordered from Amazon the FOXWELL NT630 Elite, hopefully that will help me out.

Once again, Iíll stay in touch. As usual, always open for suggestions 🙃
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Quote:
Originally Posted by Time4Tini View Post
So I bought a new scanner today I never opened it, Actron CP9600, itís a Bluetooth/iPhone scanner. After the reading reviews, nah, not for me. It seems after you pay the $100 for the unit, you are nickel & dimed to retrieve the info YOU NEED. The store told me I canít return it, because itís an electronic product. Trust me, I will get my money back. UNOPENED, give me a break. I just ordered from Amazon the FOXWELL NT630 Elite, hopefully that will help me out.

Once again, Iíll stay in touch. As usual, always open for suggestions 🙃
Hi,

IMHO don't keep wasting your money, an SDS system can be had for as little as £399 in UK, plug and play, I don't know why anyone bothers with all this other stuff ..............

(Well actually I do, it's because they don't listen and understand the difference) ............. SDS is far more than just a code reader / resetter

"Lesser" equipment will not access everything or every possible fault code, and does not have all the features that SDS has .

Ask anyone who has used SDS for a while whether they would advocate buying other stuff

HTH,

Cheers Dave
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I thought that this thread was regarding the problem that you had in not being able to raise the rear windows? It seems to be digressing? Anyway, how are you progressing with that problem? Interesting to know ....

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Hi David,

As far as I can see it still is about the roof problem, plus other (SRS and CD Wiring Plug) issues that have cropped up as he's working on the VR fault

It looks to me like he's now just having grief getting decent kit to diagnose VR and SRS, and as we all (should) know OBD stuff from EBay / Amazon etc is not going to cut the mustard

Cheers Dave
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It really does seem that the clue is here:

Quote:
Originally Posted by Time4Tini View Post

I just have a gut feeling it has something to do with the roof not latching properly to the windshield (or as a lot of you say "windscreen" ). The one positive thing, the TOP goes down just fine, so nothing stopping me from getting some wind therapy!

Thanks, guys!
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#16 Old 1 Week Ago
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/\ /\ /\ +1

Post # 5 and then # 6 by @efair get my money .....................

SDS will confirm switch states in less time than it takes to boot up

Q What happens after the Roof Lock Micro-Switches say "Yeah, OK, I'm Closed now"

A The VR says "OK, better close the Boot then when Boot is done better close Rear Windows now" ............................

Who want's to bet it's a Microswitch issue
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