mercedes no crank (when Hot) 

or the Autel IM608 used in the video; US: amzn.to/3gyPxas Use this promotion code: YTWZGKUM You save $130 UK: amzn.to/3f9IHI1 Use this promotion code: OH3I8FPD You save ￡100 DE: amzn.to/3fmnDyt Use this p[romotion code: 6DRDGXKA You save €100

This is honestly the best automotive learning channel on RU-vid.

Who puts an ECU ON TOP OF AN ENGINE!? Ze germans, that's who. Nice work, Dan!

I remember working on a lot of Mercedes back in the day. Non starting when hot was a pretty common problem with the old w201,w124 thru w202 models. Nine times out of ten it was usually a crank angle sensor fault or a cooked fuel pump relay due to a lazy fuel pump. I remember on more than one occasion having a customer come into the shop with a Mercedes that wouldn't start when it was hot. They would normally tell me, I managed to drive it a couple of blocks to get it here, but if I turn it off I guarantee it won't restart. I asked them to pop the hood and I go away to grab some tools, only to return with a glass of iced water and proceed to pour it down the back of the engine block. Then ask the customer to hop in and start the car. The look on their face when the car starts right up is priceless, because they think you're just fixed there car with a glass of water. ! Chilling down the crank angle sensor with ice water is a poor man's reset if you like. It doesn't always work of course (depending on the fault) but I had a lot of success with this method. And it just goes to show you don't need a lot of expensive diagnosis tools if you're doing this at home and don't have a lot of money,. You just need to use a few secret tricks of the trade. Even too this day, I still know mechanics that can't diagnose faults in early Mercedes. Admittedly they can be a little problematic without the right equipment. Great series of videos by the way. Keep up the good work 👍

The people giving thumbs down to these informative videos needs diagnosis.

It's amazing how modules never think there is anything wrong with themselves!!!!

You are such a clever guy and i love how you explain your thought process You should be a teacher 😀😀

wow, just discovered your channel and it’s absolutely amazing. your skills are right on point and specific no nonsense delivery is extremely educational. Excellent camerawork too. Will definitely be watching more!

My Congratulations Dan! Congrats on 100K! I have been watching and learning from you since you had around 5K. Thanks a lot for your time and effort. Take care brotha and greetings from Canada)

Nice video Dan, I’m a Mercedes dealer apprentice, as soon as I saw the title I screamed “It needs an ME” I once had a CLS500 lose fuel pump command intermittently, another tech told me to tap on the ME with a rubber mallet and see if it works. Surprise surprise look who’s got a running fuel pump. I guess sometimes you gotta think like Jermey Clarkson

So good to see you again Dan. Now back to the video...

I always get that `Dan will fix it ` feeling when i start watching these.

Why would anyone put ECU on the top of the engine, when there is perfectly working exhaust pipe

Dan, your videos are some of my favourite to watch. Always learn so much. Not just automotive knowledge, but better ways of looking at everyday problems and working through them. Much appreciated.

Diagnosing is an art, and you are an artist. Thanks for always being so informative 🙏🏻

You are an outstanding diagnostician. One of the very best on the internet! Very informative and thorough. Thank you!

Placing the engine control module on top of the engine was a design flaw. An ECU is ti be kept away from vibration, heat, splash of water etc. Great work as usual Dan!

Great job Dan! I wish all repair shops would have a man like you! You have a good logic thinking when it comes to troubleshooting! Hope to see more videos from you! Best regards!

Great video, Dan. Well done and very informative. Appreciate you taking us along on your diagnosis of the MB. Please keep them coming.

Man you are one of the best technicians I’ve ever seen so far, I own a mechanic shop for the past 16 years I work on all German cars, and do work alone because nobody wants to work unfortunately, but I love watching your videos you are such an amazing guy very nice humble I wish if we have more guys like you you really remind me of myself every time I watch your video, thank you so much for this wonderful videos man I really do enjoy it keep up the good work you are an amazing guy we appreciate you from the bottom of our hearts❤

DAN!!!!! ANOTHER FANTASTIC DIAGNOSIS! I literally try and find the issues with you and pause the video and think what to look at next. I really enjoy your videos. I learn more advanced diagnostics, and am always impressed by your professionalism and approach to “Fixing it again!”. One of my favorite channels by far. Please keep up the good work.

Love u Dan and I love it even more when you are making videos for us !!! Appreciate it !!!

Great video :-) Coming from the "IT world" I would say that the automotive business could (/should) make things easier for themselves by actually putting more efforts in error handling. In this case I think it should be possible to get an errorcode indicating that no signal goes to the starterrelay when input comes from the ignitionkey.

I would love to spend a year with you soaking up your knowledge of diagnostics,its the most rewarding thing when you diagnose something and your right

Just found your channel and haven't stopped watch all your videos. I've been in the trade many years now and can say every day is a school day you never stop learning keep up the great work dan pleasure watching and learning from you.

Dan great video as usual, thanks for sharing and welcome back! One thing I would do different with this diagnosis is to bring the engine to normal temp and measure the temperature on the ecm and then heat it with the heat gun to that temperature and see if the problem happens .

Yes Welcome Back Dan!!!!!!!

Another amazing video, watching your methodical and logical approach has taught me more in 3 days than I’ve learned in a life time. Thank you for taking the time to do these videos

You sir are a master at your trade! Also can i say your presentation skills are amazing and ive been watching for a while. You certainly know how to explain and demonstrate each step really well. Love it.

Welcome back Dan, missed you mate.

Hey Dan, you had no Bloopers on this video? You're becoming a professional Presenter, Well done buddy.

Diagnose dan, teaching techs and customers alike. No wonder it's one of the best channels on the tube. I also read denton's books, worth their weight in gold 👍

Love your videos Dan. Use them as training once a week to keep me mentally active on the diag side! Keep them up and thank you!

Finally daaaaan boy 👋👋👋... good to see you my friend

Dan man,you shine every time.i will come and see you in person God's willing one day.

Dan, your aptitude for logic, reasoning and deduction are outstanding!! Another excellent video!!

The way how you count the possible faults,and then start eliminating them by proving each of them with concrete examples and getting to the real issue is absolutely Great. I had an issue with Ecu and what 3-4 mechanics couldnt prove where the problem was for around 2 months,you mentioned all of them that are related with an engine not starting in just 10 seconds. Its a pleasure to watch your videos,keep going 👍👌

Get excited when I see a new vid.

Fantastic content and incredible presentation. Thanks for all the hard work you do putting these videos out. The knowledge i learn watching these is irreplaceable!

Hi Dan excellent video again love watching your videos,you are the best I’ve seen here on RU-vid as a retired master mechanic myself worked on many different European makes started my apprenticeship in 1972 and work on the early electronic ignition and fuel injection system had my share of problems. But my old senior mechanic used to say to us “ Is The Pump Working “ before you start diving into all the other stuff hanging of it. Still makes me smile to this day. I loved been the guy ask to solved the hard problems on these cars. Now I am semi retired but I started a little business making electronic replacement car keys I love it helping out people for a reasonable price and keep my brain active. Keep up the great work. Cheers Irish Paul

Wow! Looking good sir! The facial hair looks good on you. 😉👍🏻👍🏻Now onto the video.... 😅😅

You are going to make 100k soon congratulations mate well deserved💪👍👍

Love this guys Vids! They are so informative and helpful , its like watching a lecture , perfect explanation , easy to understand . Thanks for the excellent work! Its an absolute privilege to be able to watch a person with your skills work .

i only came across your videos yesterday evening but have watched quite a few now cant stop watching . nice to see a mechanic not afraid to get their hands dirty and not wear rubber gloves your videos should be mandatory watching for any apprentice mechanic you are not only a mechanic you are an electrician a producer a host a editor a teacher and it would not surprise at all if you were playing all of the instruments in the music on your videos

That mod shows as a $600 dollar USD unit online. Here in the States a repair shop usually doubles the price of a part but they usually get a big discount too so its like double dipping Ouch. Love how you troubleshoot . love all the testers too

Coming soon from Mercedes, placing the ECM in the oil pan.

Great diag! I'm a candidate for replacing a master technician who recently quit at our shop, and I've been bombarded with diagnosis like this recently. Keeping your advice in the back of my head has been a great help, so thank you for that!

Thank you for taking the time to make these videos. They help more than you know and we really appreciate them!!

Dan, Great video, Why in the world would a car maker put the computer right on top of the engine? Seems idiotic. I am on the other side of the planet from you Portland, Oregon USA, Thanks for your videos Great Stuff

How do I get 1 of those Diagnose Dan shirts? I want one! I got tired watching you get in and out of the car heating that engine computer! Great diag and fix as always Dan! Thank you!

Thank you for another AWESOME video, Dan, i had a similar troublesome car in my place, and i can honestly say your tutorials are the very BEST, you should be getting around 20 Billion subscribers and RU-vid should be filing for Bankruptcy due to Trillions of Dollars/ Pounds owed to you in Royalties !! 🙂 please continue posting more into infinity and beyond video's, without Buzz Lightyear 😇

As a retire Master Motor Mechanic I just love your channel. I served my 5 year apprenticeship in Dublin / Ireland with a large very established motor company called Huet Motors main dealers Rolls Royce, British Leyland, Jaguar, Rover, Saab, Volvo and everything in between I was a very keen apprentice and love my job working especially with the older tradesmen and gaining knowledge not written in books. We worked on the very early fuel & electronic system particularly Bosch. My most senior mechanic was great we had a gearbox shop, engine shop, panel / painting shop, automatic transmission shopI auto electrical shop spent at least 6 months in each shop learning everything I could ended up travelling the world working for the likes of Mercedes, BMW, Porsche, and many exotic makes. I like to move around to gain as much experience on all the different makes and how they done it. Eventually opening my own repair shops in Australia. Just to finish I really appreciate a good tradesman when they take pride in there work and from what I can see you are one of the best around. Keep up the great work Cheers Irish Paul

Oh yes we CAN ! 👍☺

I think I'd fit a hot start button because I'm a cheapskate! LOL

It's good to watch this stuff, and Dan don't really have to worry about giving away his secrets because really you always need a ton of special scan tools etc to really finish most of the jobs.

Gracias Dan . He decidido ver todos tus videos para aprender extrategias de diagnosticos . I'm a english language learning too .

Dan, I think it would be possible to add some insulation (heat resistant material ) between the engine computer and engine to isolate the computer from heat damage, because the new computer will be subject to the same conditions as before and shorten the computers life. A little design flaw from Mercedes.

Dan this is the same problem as to Astra G petrol engines...because of the position of the ecu which is situated on top of the engine and as i see this E class also has a petrol engine. I don’t know if the engingeers did this on purpose but i do really think that this is very wrong

I'm impressed! Well done Dan!

Impressive and very thorough analysis. Very useful .

Automatic played,, Real automotive master,,

"I need this car to be reliable "... poor lady.

wow you are tenacious with your diagnosis. good job.

You are the super diagnostician as always ❤ ♥ 💖 Thank you very very much for sharing your experiences with us. Lots of love from India.

love your videos dan i have always done my own mechanics but now with all this computerised crap its harder for an old bloke like me in the old days of carby and points i could get any car running and driving

Every black E class station vagon looks like a hearse. MB says " The Best or Nothing"... If over the engine ECU is the best, what is the worse ?

By far the best RU-vid channel.

When this guy showed he was gonna use the IM608 to program the ME I found it funny thinking he must be joking. No way, Jose. IM608 is a mid range diagnostic tool good for keys but not for coding/flashing a Mercedes ECM. Yep, he figured that right, he needed STAR to accomplish the task. Despite the high cost the new Xentry are a beast and a tech who cures MBs for a living does need one. No way around it. Good video. From the beginning when the video started rolling I already knew the ECM was the problem. Common thing on these engine mounted modules. The engineers at Mercedes Benz are some of the biggest jokes in the car manufacturing business! Followed by Land Rover/Jaguar and then BMW.

Next time they put the engine computer on or into the exhaust🔥manifold, just to prove a point, namely total reliability !? Daimler Benz should pay for this computer, because of stuffed 😈up design engineering !! Billy goats 🐐🐐🐐 !!!

I would be pissed to find out that my expensive scan tool can't do the job and i need the factory tool.

Well done Dan, you are the master of diagnosticians ! Imagine other shop replacing battery, relay, starter and not fixing the problem :D

I have been hanging for your next vid Dan. Best entertainment on RU-vid. Love your channel and the way you go about diagnosing faults.

look at the interior lighting , difference when hot or cold [2 min. in ] lets look more of the video ................ AC tronics i presume

Why would they think a good place for that ECU is on top of the engine? Just wow!

As always professionally presented diagnostic techniques and exact fault with solution 👍🏻 Well done Dan and cannot wait to see another video 😉

Brilliant job Dan, am sure many benefited from watching your videos do keep up with the great work👍🏻

Detroit diesel been doing this reliably for long years

Wow, this playes like Dr House. And engine computer ON? the engine, damn. Engineers at Mercedes.... where do we put the temperature sensitive computerbox...eh? Well, put it on the engine. Seems legit. That's just dumb.

Danny thank you for this nice video. My students and I are glad you make these. Many things get much clearer when you show them on an actual car, your procedure, thoughtproces and the different tools someone can use to diagnose a car. Thanks again and keep up the good work. And by the way nice beard, looks good on you. Greeting Hans

Great diagnosed Dan, You're supercillous in diagnosing, i learned from you more and more onwards.

Boom

Out take... "Oops...forgot to put the relay back in.."

A brilliant video. It really shows the power of knowledge and systematic troubleshooting. All of us consumers wish we had our own Dan for non-routine issues.

Thanks for your perfect diagnosis and deserve 1000 likes. I have a similar problem my car w220 2001 when ever I drive it for aprox 25 minutes it stop working and display esp bas and it needs aprox 2 to 10 minutes to start again and malfunction is clear. I checked with carage they can't find the problem. This is first time I see RU-vidr explain in details and not wasting the time appreciate your kind work.

At 0:55, without having watched the rest of the video, I guessed the engine computer, seeing it sitting right there on top of a hot engine. What a dumb idea.

Genius work Sir.........! Excellent combination of skill, patience, science, and of course, common sense. Thanks for the great video. Young upcoming mechanics, this is what you strive for......!

I love your videos! You don't waste time looking in the wrong place because you use your knowledge and logic. I also like your professional workshop equipment. I'm looking forward to more videos and thanks for sharing your solution with the world. Autel is number one for me. I recommend to all a combination of IM608 and MK908. They are powerful tools.

Thanks for showed that book I have been looking around something like that and I couldn't till today.overall,Sr.you are one of the most trusted and enthusiastic people that I can definitely learn from thanks 😊 again. Excellent job.👌

Hey Dan nice to see your videos again, both my Wife and I enjoyed wacthcing aalmost all of them, as she states, your way of explaining complex concepts is awesome regards from Mexico City and thanks for sharing your valuable knowledge

Very well done , love the logic of diagnosing the problem, Great work Dan, Thank you.

I had the same problem on a 99 golf, would not crank when hot. It was the alternator, when I changed the alternator it finally solved the problem. Really enjoying your channel especially the DSG auto box breakdown.

You have so much wisdom in the field of automotive very good jobs

You make Euros look easy brother. Great work.

I think Dan knows what the fault fix is straight away but good that he shows other things to check to make sure, I'm learning through watching everyone of his videos, keep up the good work Dan.

Your videos are always top notch! Thanks for sharing Dan!

Great approach for solving problems! Thanks for your great videos Dan!

Being a Automation and robotic service technicien I really enjoy your content. Your diagnostic critical thinking is really good

Actually that what we are facing with most of the work shop. So I decide to repair our family cars myself. I'm purchasing the special tools if necessary and parts. Thanks for your video please keep continuing learning people that the diagnostic is 95% of the repair.

I like that you show us those unsuccessful times such as when you heat the ecm up and it still cranks. Awesome channel. Really enjoy watching your vids man.

When something breaks twice, you have to wonder what causes it ...A sensitive part as a computer that has to endure low temperature to very hot put inside at the top center of an engine bay is very questionable !! You are the best on youtube for the transmission of car knowledge fixing . THanks a lot from Montréal , Canada .