2010 Mercedes Benz GL450 Lean Bank 1 & Bank 2

[@PineHollowAutoDiagnostics]

Ah Euros always have hidden variables! Great diag and explanation, Bernie!

[@WeakPiggy]

I'm not sure what we did as a car community to deserve someone like you. I wish you'd post more videos. Even if it's "simple" diag

[@frankjohn4302]

You could here the dissapointment in his voice because of the first shop not replacing filter.Great diag Bernie

[@djosbun]

I was hoping to see the amp draw on the fuel pump when you were filling up the bucket directly from the pump itself (before the fuel went through the filter). Thank you for sharing your diagnostic path with us, Bernie.

[@rodvan-zeller6360]

At 14:3, thank you for mentioning that it took a long time to get the seat out of the vehicle. There are a lot of shop owners and managers in the industry that tell their techs if it takes longer than 20 minutes to diagnose a problem, they don't know what they are doing. The problem is the techs need their job and have to put up with that type of abusive nonsense which stresses them out and erodes their self esteem.

[@edwardboers1993]

Now we know why so many technicians are starting their own mobile repair businesses... we get to set the time we charge to the customer and dont have to listen to the nonsense criticisms

[@rodvan-zeller6360]

@@edwardboers1993 Agreed. Also have experienced narcissistic employers whose only purpose in life was to prove me wrong, they did not understand the difference between cooperation and competition

[@herbertwatson1245]

Mr Thomson your are a master on any car you give a lot of people in this business hope we can do better and get close to your level thank you

[@rodvan-zeller6360]

At 3:0 , thank you for showing mode 6 and how it can be used, I have been using mode 6 as part of my diagnostic strategy since I purchased your very first edition of the Escan many years ago, the reason I am making this comment is because you would not believe the very high percentage of techs who have told me that mode 6 is completely useless and misleading.

[@timothybarnes533]

Bernie please keep recording your work on here I’m learning a lot!!!

[@pl5882]

The master is back with a new vid

[@eurowerx4267]

This is a perfect example of why you must replace them together. Don’t forget the relay also. I’ve seen many people burned doing just a pump! Product knowledge is huge! Same as AC compressors, replace the receiver dryer! Good insurance! Nice video though

[@dannyn5041]

Great job that scanner is like an expert compared to others

[@Evesautomotive]

THAT'S WHAT I' TALKING ABOUT! Thank you Mr. Thompson. Not only did you diagnose it, but you followed thru to confirm it. Sure, you could've said that there was a restriction, but until it is fixed it is hearsay. Don't care how concrete your diag is, a fix backs it up. Thank you.

[@DJ-tn7vj]

Hi Mr Bearnie. Thanks for always going beyond and the continuous info that you share daily

[@diagnosticcheck9803]

Another perfect explanation whilst enriching the technicians knowledge and understanding

[@maringaragem113]

Aíqtuuuuuudo o Pico já da automático a rpm mas foi um exemplo de diagnóstico

[@davidanderson7976]

Great Info from start to finish. Thankyou for sharing your experience

[@operationbs7610]

You would think if you were going to replace a fuel pump, you'd also replace the fuel filter..those should always go hand in hand. What a great explanation, throughly impressed 👏

[@mikechiodetti4482]

Bernie, YOU FOUND THE PROBLEM! That's what counts! It is frustrating coming behind someone else, not knowing what was done, but like you said, don't trust what someone else "SAID" they did!

[@charlesbarkwell7693]

Another Salute to Mr. Bernie Thompson outta New Mexico ! from Charlie Barkwell ( Long Beach, CA. ) (Southern )

[@baxrok2.]

"..get a scope, get some data..." Well said Bernie. Thanks!

[@rodvan-zeller6360]

Make no mistake when they lie or omit information, they do it on purpose out of envy and malice. This is a form of bullying, several of my previous employers would lie and or omit crucial information on my diagnostic assignments so that they could look smart in the end. When I was teaching school, many times I witnessed the cretins bullying the intelligent students out of envy. This was another great video, thank you.

[@timstanford3443]

Another awesome diagnosis in the books! Thank you Bernie, I really enjoy your videos and learning from you!

[@cliff499]

Your videos are the best !!!!

[@metaphysicaudio]

Thank you so much for doing these videos. You are a wonderful gold mine of knowledge. Can’t wait for your class at Vision KC next week! :D

[@dtnel]

It was a awesome class! Ill be back next year if we can make it.

[@spirokattan3655]

Great step by step diagnosis Bernie. Thank you!!

[@MrBeefsnorkel]

as long as we've watched bernie work his MAGIC, i want to buy the ats software and do my own diagnostic business

[@gregjones8501]

Good to see another great video Bernie! I gitta confess I’ve been torn on getting the recipe but after seeing this video and having you explain some of its usage up close and more in depth it may just be in the works here soon! Thanks again for sharing with us your unique path of diagnostic strategy!

[@mdushaka6403]

Bernie u are my mentor,l salute you and respect you

[@arthurdigar2201]

never believe what a customer or other tech tells you... It is true

[@upnorthballa]

Come to MI! We have a crazy Volvo Great video

[@scottschantz2553]

Great job again Bernie! I look forward to every one of your videos. They never disappoint. I own some of your equipment and it works great. One day I hope to afford to purchase more. Thanks for sharing your experience and expertise. You're a huge asset to this industry.

[@tonymai1844]

those e-scanner and scope is very needed. looking at the data on the numbers is not enough information. Scope is the way technician needed.

[@adrianglessner5979]

Nice to see you posting videos again. Great work please keep your educating up. Your a true inspiration.

[@jeffg1149]

Wondering If you could have used the fuse rather than pulling the seat for the Amp clamp.

[@keltecshooter]

Believe it or not there are a lot of those trucks with no access panels and dropping the tank is the only access to the pump , electrical testing can be done at the tank connector plug .

[@suryaprihadi2258]

For anyone who will be troubleshooting typical Mercedes fuel system like this 2010 GL450 or the common E-Class W212 , there are a few hardware design you must keep in mind. Mercedes fuel tank is a 2 chambers saddle design. Fuel pump at RIGHT side saddle and fuel filter at LEFT side saddle. These 2 chambers do not parallel or share fuel between each other when fuel level down to 80% or lower. So the fuel pump has 2 duties. 1st is to supply fuel to engine via a fuel filter and 2nd duty is to provide jet suction effect at LEFT chamber , to pump fuel back to RIGHT chamber into the fuel pump bowl shaped body. There is a Y valve splitting the fuel flow. Yes ODD design but that is the way it is to clear drive shaft from tranny to differential, hence the saddle shaped 2 chambers fuel tank design. Without the 2nd duty, the RIGHT chamber will be deprived of fuel fast when overall fuel tank level is 50% or less. There are 2 fuel level sensors too, LEFT and RIGHT side ones. So do not base a proper fuel output of fuel pump without taking into account the 2nd duty of the fuel pump, there then you can get the NET fuel flow to the fuel filter aka to the engine. The fuel filter element inside the fuel filter assy itself is no more than 36ish grams of paper media weight. So at best the fuel filter will be clogged by contamination worth 36 grams. This GL450 is using M273 V8 4.7 Liter engine, I believe so. At 17MPG and 50,000 miles , if fuel dirt is at 5PPM (parts per million) or 0.005% by weight, the near 3,000 gallons of total fuel passing thru the filter element would have 37 grams of dirt captured. To believe that gasoline can be 100% clean without any dirt % from various fuel transfer procedures is a fantasy. To replace fuel pump first before replacing a fuel filter is a joke. Using MB Xentry or any MB capable scanner like Autel or Launch, the fuel pressure at the filtered output of the fuel filter can be read from N118 module and it will be higher by approx 10-15 psi when compared to the engine bay test port, this is normal as from tank to engine bay the small fuel line running 4 meters and elevation of 50cm does offer HEAD/resistance. Happy troubleshooting guys..... PS - I replaced my W212.065 E400 M276.820 3.0 Turbo direct injection, fuel filter at 20,000 miles or approx 1,200 gallons of fuel burnt. No trouble codes whatsoever, but I do monitor my low pressure fuel pressure often while at WOT 1st gear and 2nd gear. Knowing my developing country fuel cleanliness is not as good as 1st world countries, extra caution must be practiced. The test result showed at WOT 1st and 2nd gear, I was getting only 4.2 BAR at HP fuel pump inlet and that is borderline decent. New fuel filter brought it back to 5 BAR. The Bosch 200 BAR HP fuel pump on my engine requires minimum of 4 BAR as input pressure. The fuel filter element has not clogged in anyway fatal, but it has trapped enough dirt to cause decreased fuel flow. Don't ever fuel starve a Bosch single piston GDI HP fuel pump, the fuel itself is the pump's single piston only lubrication internal to the pump. Engine oil lubrication does not touch the HP fuel pump internal, only the external spring get the engine oil lubrication.

[@courtneysmith4354]

Thanks bernie always been looking out for you with amazing video.. to learn to used the one I bought a few months ago the ESCAN ELITE very good scan tool . Now I’m thinking have getting escopeElite labscope. Thank you Bernie

[@kirkabrahamson1148]

The master art work. Its a beautiful thing.

[@agoodneighborautorepair2176]

👋Sir very nice explanation and information, blessings.

[@neverstoplearning382]

Amazing master. God bless.

[@blueskiesmobileauto4253]

Very cool diagnosis methods!

[@brianmason8400]

Great video as always! I know all to well that you can only do what work the customer authorized. BUT, unless the customer said absolutely not, what professional shop in their right mind would replace a fuel pump and not put a filter in too? Myself personally, I've even gone as far as recommending replacing the fuel pump relay because as much as it gets used and switches on/off and so forth....

[@DKr475]

Great case study. Need more!

[@IamReadyToRock]

otro nivel de diagnostico. Increíble

[@rodvan-zeller6360]

Any chance you can make a video explaining mode6. There are some ignorant individuals claiming that mode 6 is useless and misleading causes misdiagnosis and unnecessary parts replacement. The mode 6 on the Escan is the best one out there and it provides another piece of the puzzle when performing difficult diagnosis.

[@VashthStampeede]

I don't know if anyone else caught this, but your waveform shows a 10 commutator pump.

[@fivefortyeye540i]

This truly next level diagnostic

[@bme7491]

My 2002 Toyota Highlander had P0171 & P0174. O2 sensor at constant speed (40mph) was sitting at 0.75 volts. Turned out to be an under reporting MAF.

[@dasoscouper681]

Thank you Berny you are the best

[@viisteist1363]

can we see the old faulty filter/part too next time?

[@everytoolashammer9427]

Most 4x4 with a subframe and not full frame are like this, sometimes two pumps. From what I’ve seen it’s because the driveshaft sits high and usually causes that hump.

[@saizaleggs]

Thanks for sharing uncle Bernie!

[@tinkerwest]

The parts cannon would've sufficed in this case, had there been no inline fuel filter beyond the pump's sock filter which is what you find with most cars nowadays. Of course, nothing beats knowing how to properly diagnose and repair as once again demonstrated by Bernie.

[@charleshenshaw9099]

If the first repair shop only did what they said they did all of this could have been avoided. So many rip off repair shops out there consumers don't know who to trust. The worst part is the good ones suffer.

[@wolleysegap9740]

Be nice if we could see the scanner. What you're looking at.

[@charlesbarkwell7693]

Automotive Test Solutions LapTop Escan Elite : www.automotivetestsolutions.com Headquarters : Albuquerque, New Mexico - " Big Dogs Neighborhood " Licensed to Sale the EScan : www.aeswave.com Fresno, CA.

[@kdmq]

Have you ever got a Pontiac Aztek with a smashed windshield?

[@James-fs4rn]

👍can't get enough of videos

[@jessemackenzie6516]

One of the icons on your windows toolbar has the e scope elite waveform but it has a 2 . Are you developing a 2 channel scope?

[@dexfriday5524]

Awesome video!!!

[@miguelparedes1888]

Hey Bernie , so I’m confused because on the diagnosis you said that the. Fuel filter was clogged but then in the end you said that the shop that was working on the car prior did not put a fuel filter in , so the fact that the car DID NOT have a fuel filter was causing the car to have fuel delivery issue? Not understanding this one ..

[@gustavomartinez324]

Thier was a restricted filter causes Air fuel ratio to be off and not 14:7 perfect air fuel ratio

[@gustavomartinez324]

A restriction causes the problem new filter car fixed bring the car air fuel ratio to normal specs any questions feel free to ask thank have nice day

[@billsmith2212]

What the FIRST shop needs is two signs : IDIOTS at WORK and Rip Offs at Work . That customer should stand on the sidewalk and hand the customers copies of the bill on the filter . Then the SECOND bill from shop #2 . All while wearing the Rip Off sign . It's not libel , it's TRUTH !

[@damiadedapo5363]

What scantool is Bernie using?

[@damiadedapo5363]

Got it

[@damiadedapo5363]

Escan elite

[@JOHNPHUFNAGEL]

great video

[@bme7491]

Looks like the scan software uses LabVIEW.

[@xaviergonzalez5828]

Thank you Sir !,,

[@markhollins2190]

He's good

[@ArturMoisiiadi]

It's brilliant!

[@AJ-wj9ij]

Filter was the first thing I would check regardless of condition I would set a control to start with what a waste of time

[@JACKATTACKED]

👍

[@mike-yp1uk]

Found it again.

[@Johnkb2059]

The 1st pump probably burnt out because of the clog fuel pump

[@ismarmeskovic]

👍👍👍

[@herbertwatson1245]

Wonder who taught him he should do a vid about his back round and how he started

[@alimohamed2124]

the basics ,,,it's a piston engine

[@ronslaughterandalice1018]

I’m not a smart man and I am just only trying to learn every thing about diagnostics as I ca take in . But I feel like I have a leg up cause I don’t trust it when someone says they put a new part on it.

[@maximus518774]

Most shop mechanics these days are just parts changers.

[@bobgall863]

Not sure how many man hours got lost for fuel filter. Somebody should have pretty red face.

[@tracyevans7886]

? ᵖʳᵒᵐᵒˢᵐ

[@idopshik]

Как же это тупо. А строят из себя умника. Фильтр поменять не алё.

[@aymenmohamed1134]

👍🏻👍🏻👍🏻