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I finally got around to changing the driver's side door handles due to the keyless go not functioning for a while. After changing the driver's door, it seems that the functions are reversed. Pulling the handle button will lock the car, and pressing the square exterior button opens the car. The passenger side doors work as intended, and due to this I haven't decided to change the rear driver's door just yet, so it is still nonfunctional.
I purchased the handles directly from the dealer. Is it possible the wires got mixed up during production, or do I have a more serious problem on my hands? Also I'd just like to note that when I purchased the car, the driver's handle functioned properly.
Well, that's funny. The most reasonable answer is that the resistors inside the new door handle you bought from the dealership somehow it got switched. There is a 370 ohm resistor and a 200 ohm resistor inside the door handle. Depending on which button you press it either unlocks or locks doors by passing current through that resistor.
I would take it back to the dealer and tell them this issue. They may and greatly so should give you a different one.
You can also test this and verify by buying some resistors. Remove the door handle like you would for replacing it and the connector inside the door you can just stick the resistor wires inside and it should lock and unlock the doors depending on which resistor is used.
Oh boy, that's unfortunate. I hope they can resolve my issue without going in as I ordered the handles from a dealership that isn't anywhere near my house.
For what it's worth, I compared the wires from my original handle and the new one. The blue & brown wires are attatched to the connector in the correct slots.
However, you can see from where the wires are first visible, they are flipped. I checked this against the rear handle as well and it appears that only the driver's door handle is wrong.
(Replacement handle on left)
I'm going to replace the rear driver's side handle tonight and see if it's working properly. I really hope this one isn't messed up too, because it had to be ordered from Germany lol.
Oh boy, that's unfortunate. I hope they can resolve my issue without going in as I ordered the handles from a dealership that isn't anywhere near my house.
For what it's worth, I compared the wires from my original handle and the new one. The blue & brown wires are attatched to the connector in the correct slots.
However, you can see from where the wires are first visible, they are flipped. I checked this against the rear handle as well and it appears that only the driver's door handle is wrong.
(Replacement handle on left)
I'm going to replace the rear driver's side handle tonight and see if it's working properly. I really hope this one isn't messed up too, because it had to be ordered from Germany lol.
It shouldn't matter how the cables go out. Idea time, check the resistance value when buttons pressed.
Grab multimeter and paper clip or a thin wire and stick inside those connectors of the door handles, not the ones inside the car.
Press the unlock button and record the value it should be either 370 or 200 ohms
Record the value for the lock button the little square one.
Compare to the other door handle. They should have the same resistance values when you press one button or the other. If they both have the same resistance values then it's something wrong with your car. What could it be though?
If you'd like, you can IM me and we can do like a little video chat or something because I have a separate door handle that I tore the guts out and replaced with some resistors I bought off Amazon and show you how to check that door handle is working properly.
Okay, I will definitely be trying that later in the day. I'll grab a multimeter from Harbor Freight on my way to work and give it a shot when I get some down time.
I just tested the rear door handle and it also works properly. So it seems only my driver's side door is affected. I emailed the dealer and they asked for my VIN to make sure I purchased the right parts.
Still waiting to hear back from them. Thanks again, I appreciate the help guys.
I was told via email last week that they were going to send me a new handle, but had to wait for the part to come in first.
I was going to test the original handle with a multimeter as suggested above, but had some other non-car related issues going on and decided to give it a rest for a bit. Now that I'm getting a new handle, I figure I'll just try that one and hopefully it will not also function with reverse controls.
I'll update once I receive the replacement handle.
The dealer received the handle yesterday and overnighted it to me. I just installed it now and it functions properly. They are also giving me a return label for the faulty handle.
Did the dealer give you any explanation?
I've had to book my car in with the dealer to have them diagnose the fault before they'll replace the handle, which I understand, but I hope they're not expecting me to pay for it!
My other concern is as it's an older car will the dealer techs be able to diagnose it without first blaming the SAM?
The dealer just gave me a new handle when I told them that the first one was faulty. They did mention that if the second handle was also faulty that I'd have to bring the car in to get the issue diagnosed.
My car has been with the dealers for nearly a week now for them to diagnose a suspected faulty new handle.
I'd like to add as a technician, this is a remarkable fault and it took some convincing myself that the new handle is faulty. The dealers are reluctant to order another one as they will be stuck with it if proven not faulty, but I feel that have come to the realisation that ordering a replacement is the only solution.
Here's some pic of me testing the handle before going to the dealers.Also attached is an interesting pdf on testing the handle. UNLOCK
LOCK BUTTON
Last edited by stchris356; Nov 23, 2021 at 08:41 AM.
A painful alternative is to swap handles with a known working handle, say another door.
Better proof than that? I would love to hear the dealer arguing with that. They sure would argue with your testing unless you slap them with some MB issued diploma . Some tech are deaf ears.
A painful alternative is to swap handles with a known working handle, say another door.
Better proof than that? I would love to hear the dealer arguing with that. They sure would argue with your testing unless you slap them with some MB issued diploma . Some tech are deaf ears.
Yes, we have done that, the only other working one we can remove is the passenger rear, which we have done and it works normally with that one.
I had a text message yesterday evening advising they are have now ordered a replacement under parts warranty, which should be due in today. My only concern now is the OP ordered his around the same time as me, are there a batch of them out there and is the new one coming today the same, I'll let you know!
Dealer rang, the new handle does the same! Now want to strip the door to look for shorting wire, which I've refused as I fail to see how this can be the problem if when you connect the rear door handle from the car the keyless go functions normally.
Call me sceptical, but I find it strange that when I ordered the handle a couple of weeks ago it took nearly a week to come from Germany, but the replacement ordered by them came overnight!
So I have the car back and now trying to find who makes the door handles to confirm the resistance spec, but not having much success finding out who they are.
I've also emailed MBUK customer support requesting some technical information but I expect I'm going to get fobbed off..........................................
Yes, we have done that, the only other working one we can remove is the passenger rear, which we have done and it works normally with that one.
I had a text message yesterday evening advising they are have now ordered a replacement under parts warranty, which should be due in today. My only concern now is the OP ordered his around the same time as me, are there a batch of them out there and is the new one coming today the same, I'll let you know!
Did you do it both ways? That is,
1 - Prove there is nothing wrong with the internals of any of your doors, i.e. not need to open, search for nothing, but bill time $$$
2 - Use the newer ones on the door that is currently working. If it fails, what would be their answer for them: it is not the door X^&*(, They may come back with: "You car has moody doors"
You need to prove your car is not the issue (which they seem to claim), but the new part.
Did you do it both ways? That is,
1 - Prove there is nothing wrong with the internals of any of your doors, i.e. not need to open, search for nothing, but bill time $$$
2 - Use the newer ones on the door that is currently working. If it fails, what would be their answer for them: it is not the door X^&*(, They may come back with: "You car has moody doors"
You need to prove your car is not the issue (which they seem to claim), but the new part.
Hello. Have the same problem. 06 CLS55 W219
Measured the resistance of brand new driver handle:
Back button 0,47 k Ohm
Front button 300 Ohm
First I thought I did something wrong. Looks like guys we are missing something.
Hello. Have the same problem. 06 CLS55 W219
Measured the resistance of brand new driver handle:
Back button 0,47 k Ohm
Front button 300 Ohm
First I thought I did something wrong. Looks like guys we are missing something.
Hi Jacob, thank you for your reply.
Did you purchase your handle recently?
Yes, bought it 4 days ago from https://www.autohauspartsdelivered.com/
They sell OEM genye MB products.
Because this problem is new rear and seems like new, I think maybe it's a factory defective batch.
The simple operation becomes to nightmare)
Yes, bought it 4 days ago from https://www.autohauspartsdelivered.com/
They sell OEM genye MB products.
Because this problem is new rear and seems like new, I think maybe it's a factory defective batch.
The simple operation becomes to nightmare)
Yes, my thought too. I've contacted MBUK but it's going to be very difficult to convince them. I work as a technician for another German car manufacturer as over the years we occasionally get faulty parts batches, so it does happen, it's getting to get them to listen to someone from outside their network that's the problem, but I'm not giving up on this!
Good luck. Yeah, something definitely not right.
Not sure what to do next. Byt I've already disassembled the new door handle to repaint it. was too fast. Now I probably can't return it.
I'm thinking to order the used one from eBay and if it works ill repaint that one and transfer the rubber button and back the big button from "factory bad one".
Also, I'll measure the resistance of the eBay one.
btw maybe if you are interested here is a video how I disassemble my door handle
Today I've ordered a used one door handle of W211 from ebay. They looks identical(same platform). 50$ for used one instead 135$(also used one but from CLS).
When ill get it ill measure the resistance and will install it on the car. We will see if it will work properly.
If it will - using a deduction method and logic we were dealing with "factory bad replacement parts".
I will update later.
BTW here are some pictures. In the photo, you can see it is manufactured at the end of July 2021. Today is November 2021.
New replacement door handle sticker swap from w211 to w219
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
. Some tech are deaf ears.
