How to Replace a Failed Tailgate Latch Lock Mechanism on a Mercedes-Benz W164 / X164

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Dear viewer,
In this video I am showing you how to replace a failed or failing trunk latch on a ML W164 and GL X164 Mercedes Benz. The process and the latch is identical regardless if you have the base model with just the soft-close function or a vehicle that is speced out the automatic opening and closing tailgate.
Usually what happens with these latches is that the soft close mechanism inside of them fails, thus forcing the owner to slam the trunk closed. While this is a workaround for the issue and will get you by for some time, eventually the latch will fail completely and the tailgate will no longer stay closed. Therefore it is a good option to just go ahead and replace the failed latch without postponing this too much. OE part number for the latch is A164 740 03 35. While the price for a new latch varies, depending on whether you order an Ebay special or buy one directly from Mercedesl. That being said, my advice is to get one that is from a reputable brand and is built to the OE standards.
If you liked the video, please consider giving it a thumbs up and subscribe to the channel for more content like this! As always if you have any questions, feel free to post them in the comment section below. I do my best to answer to all comments.
Regards,
Endless MotorWorks Team
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13 ноя 2021

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Комментарии : 49

@user-fu3bi3mb3k 27 дней назад

Very helpful. Had it all apart and back together inside of an hour with the new latch installed. Thanks for spending half an hour trying to figure out how to get the latch passed the emerg release. After watching that you saved in 29 minutes. Also, very helpful to know which sequence to take the panels off. My only suggestion would be to not tell us what you don’t know but to simply stop and make your edit there. It will certainly streamline your videos. Thanks again.

@EndlessMotorWorks 25 дней назад

I am happy that the video helped you out. Point taken on your suggestion. Certainly makes sense! :)

@shittygitty71 Год назад

thanks for filming this repair... i just replace the latch 30 minutes ago on my 2008 ML350 and you walked me through it perfectly - step by step. much appreciated!

@EndlessMotorWorks Год назад

I am happy the video helped you out!

@eltonsbbq-pit 2 года назад

Did the same repair today. Your guide was very useful so thanks for sharing! Cheers from Norway

@EndlessMotorWorks 2 года назад

I am happy to hear that! Thanks for watching the vide and sharing your experience!

@stevelarsen7450 7 месяцев назад

Still relevant. Thanks for putting this up.

@EndlessMotorWorks 6 месяцев назад

Thanks!

@kristicampbell7246 2 месяца назад

Amacing thabkyou so much

@SaahSangbah Год назад

Your instructional guidance was plain and simple and I am going to use it tomorrow for the replacement of my 2007 320 CDI latch. will let you know the outcome

@EndlessMotorWorks Год назад

I am happy to hear that you found the video helpful.

@allez1984 Год назад

Thanks so much! This went quicker than it would have if I didn't know which trim pieces to remove at what time. Also, I drilled out the rivets since I had some 3/16" on-hand. I'm assuming that was MUCH easier than pulling and bending and making sure the lock was removed without breaking that interior hatch release. Again, thank you!

@EndlessMotorWorks Год назад

I am happy to hear the vide helped you out. And you are correct, if I would have just drilled out the rivets and replaced them after that would have made things a lot easier. Still, with filming and doing all of the work it took no more than 40min, so I don't think it was too bad.

@VitorMadeira 2 года назад

Great help. Thank you. Greetings from Portugal.

@EndlessMotorWorks 2 года назад

You're welcome!

@stanleysheppard8464 Год назад

Thanks for taking the time to make this video! Will be doing the same repair myself this week after I receive new aftermarket actuator lock that seems to be getting a lot of positive reviews on Amazon. Bought the lock for US $43 plus tools to remove plastic trim pieces for $12 and BMW clips that you mentioned for $7.

@EndlessMotorWorks Год назад

Thanks for watching the video and taking the time to leave a comment!

@stevedenenberg2873 Год назад

Where did you get it as I need a new latch mechanism thank you I’m in USA in California thank for the link

@ryang8425 9 месяцев назад

I have a 2015 mercedes ml350 the gate closes but does not lock I used your video and replaced the accuator and still no 2nd click and My dash light says it's open. I'm going to check the wiring but do you have any ideas what the issue could be the buttons work it opens and closes but it doesn't lock all the way sane as whst yours did in video. Any thoughts will help Thanks IA

@danielflood8416 4 месяца назад

Didn't see how you connect the cable that connect to the handle to open the door.

@alejandrocerdenia1235 2 года назад

How did you program the new lock to your key fob? I own a 2009 ml320 bluetec.

@EndlessMotorWorks 2 года назад

The tailgate lock doesn't need to be programmed.

@rudygrajeda1510 10 месяцев назад

You can drill out the rivits in the plastic piece and install new ones when you're done. Takes like 2 minutes.

@EndlessMotorWorks 10 месяцев назад

I know, but the idea here was to show this being done in away that most people would be able to follow. Not everyone has a cordless drill, nor a rivet gun. That being said, would drilling the rivets out make it easier - for sure, I can't deny that.

@ValdisVitols 2 года назад

maybe you can share the bmw part number for the clips? (as far as i remember there were more than 10 of them and they cost quite a fortune [mb indicates theyre one time use only])

@EndlessMotorWorks 2 года назад

They are "one time use" if they break. If they are fine you can reuse them. The BMW clips I have are chinese knockoffs. I bought them from a local auto parts store when they were doing a clearance of old inventory. I got like 10 of these baggies with 10 clips in each one for about 5 bucks. I certainly don't recommend going to the dealer for these clips, as you can also find them pretty cheap on Amazon and Ebay. That being said the BMW part number for this style of clips is 51411973500.

@skyhghmclvn25 7 месяцев назад

I replaced my ml350 actuator. When the car is off and locked i noticed that the front and rear signal lights flash every so often. Any ideas why this is happening?

@EndlessMotorWorks 6 месяцев назад

I would recommend reading the codes that have been stored using STAR diagnostics. Most likely the rear SAM module has incurred some water damage (quite common on these MLs). Issues with the rear SAM module can result in all kinds of electrical gremlins, specially related to the lights.

@skyhghmclvn25 6 месяцев назад

@@EndlessMotorWorks spot on mate! Cleaned connectors and it's up and running. Aux belt tore the next day. And now engine management light. Brilliant past two months for the Merc 😂

@EndlessMotorWorks 6 месяцев назад

@@skyhghmclvn25 If you got corrosion in the connectors of the rear SAM, I would recommend replacing the gasket on that side taillight. It is the location from where water tends to drip onto it. If that gasket gets really bad, when you pressure wash the car, it will flood the chamber where the rear SAM is located and then it is game over for it.

@Neverdyingpride 2 года назад

thank you where did you bought it

@EndlessMotorWorks 2 года назад

I got it from autodoc.eu . I always get all of my parts from there. Delivery is a bit slow, but prices are unmatched.

@dirkteale7848 9 месяцев назад

Great video. Are you able to advise a non-OEM supplier?

@EndlessMotorWorks 8 месяцев назад

Pretty much anything that is a name brand would be fine. I have seen people buying the cheap ebay stuff and those don't seem to last that long.

@user-uw7vh7zh5h 4 месяца назад

Привет! Смених и аз бравата спрямо указанията ти и се получи. Проблема при мен е че след като я смених спря да се вдига и затваря автоматично. Имаш ли някакви идеи от какво може да е? Поздрави!

@MrMSmith 2 года назад

Thank you for great video. I replaced my actuator in this way, successfully, however now it makes a clicking noise like the motor is cycling when the car is turned off. What do I do now? Yes, I fitted a new (cheaper than Mercedes genuine) actuator, now the lock is working ok BUT I hear a regular clicking noise, every 1.5 minutes. Sounds like the motor is trying to work (to do something) inside the actuator unit. Makes this noise when tailgate is in closed position (even makes this clicking noise after using a screwdriver to simulate tailgate is closed). Btw - it doesn't make the noise when engine running, nor when tailgate is simply in the horizontal open position. Please can you help to resolve, as I fear this will flatten the battery. Thanks in advance.

@EndlessMotorWorks 2 года назад

Two things to check. Is your trunk aligned properly? Meaning the striker that the lock latches to needs to be int he correct position. If it is loose or not where it should be, it can trick the latch into thinking the trunk isn't properly closed, thus causing it to cycle the soft close actuator. The other possibility is that the new lock actuator itself is faulty.

@MrMSmith 2 года назад

@@EndlessMotorWorks Thank you, so very much. Please note that even if I simulate the tailgate being closed (so with the tailgate out flat in the air I get it to 'lock' by putting a screwdriver where the latch would go and then removing the screwdriver, thus no chance of any latch misalignment etc) it still regularly (every 90 seconds) makes this noise, trying to soft close - so it's attempting to soft close onto thin air. So, I got back to the supplier of the (non-mercedes part) actuator and they very kindly sent me a replacement - but having now fitted this replacement it makes exactly the same noise and at just the same regularity. I am wondering if the cause of this is that my ML is recognising that this is not a genuine Mercedes part and so whether you know of any kit I could buy to repair the original actuator, then hopefully when I put that back onto the tailgate (having fixed it) it might well be ok? Also, I wonder, has anyone else ever experienced this continuous cycle of the soft close actuator? Many thanks for any help you can give, I am most grateful.

@EndlessMotorWorks 2 года назад

@@MrMSmith There is no way for the vehicle to recognize whether this part is genuine or not. It just a basic actuator and motor inside. The part which I used is also not genuine Mercedes-Benz, but it works just fine. I would suggest ask for a refund and just get another "better" part. I don't know if you are in Europe, but personally buy all of my parts from Autodoc and I have always been satisfied with the quality. If you are located in the US, FCP Euro and ECS Tunning are reputable retailers that sell quality parts.

@cathyhead4 11 месяцев назад

Heard you have to put power on the battery so it doesn't drain it while doing the repair or will mess with the computer.

@armandkarantonis3146 2 года назад

Bro how can I open it ,it’s close and i can’t open it

@EndlessMotorWorks 2 года назад

Good question! If the latch has failed in the closed position you will need to gain access to the trunk from the inside. Fold the seats flat and climb inside. Once you are into the trunk take a look at the bottom part of the trim roughly where the latch is situated. You will see that there is a small plastic piece that can be removed. Take that piece out and inside you will see a small lever. It is mechanically connected to the latch. Once you move it to the side, the trunk will open.

@joeimbesi99 2 года назад

Great life saver

@pernystroem8665 Год назад

The Huf Group has an annual turnover of one billion EUROS, mainly lock systems for cars. Supplier for most German car manufacturer including Porsche, Mercedes and others.

@EndlessMotorWorks Год назад

Good to know. Thanks for the info!

@Rjisawake 2 года назад

So it's very usual? I gotta replace mine now lol

@EndlessMotorWorks 2 года назад

Yes, it's quite a common failure point on the early, pre-facelift ML W164 and GL X164.

@Rjisawake 2 года назад

@@EndlessMotorWorks what's that cost usually?

@EndlessMotorWorks 2 года назад

@@Rjisawake Depends on where you will be doing the repair. The dealer will surely charge somewhere in the lines of $500-$750. At an indie shop, probably half that. The part itself, if buying a good quality aftermarket one like I did, costs $120. There are also some cheaper no-brand variants on ebay, but I don't recommend going that route.