Mercedes W212 Active Hood fault... Fault finding and repair.

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Hi
This Mercedes came to me with an intermittent Active Hood fault... also known as pedestrian protection system, and some other variants depending on the manufacturer...
On a scanning the error code D18C showed up...
First time for me working on one of these, and made a few wrong assumptions... learning as I go!😊
Follow me on this video to find out what was the problem and how to resolve it.
Note, I can confirm that this fixed the problem.
Hope you enjoy the video.
Any questions or comments put them below.
Like always, thank you for watching!

[@chrissilk341]

Remove actuators, bonnet hinges will bolt straight onto the car body as alternative brackets are there ready. Add 1.6 ohm resistors to the wiring each side that were removed from.the actuators. You now have the same setup as an E63 AMG whose owners were luckily spared the inconvenience of this feature.

[@LMAutoRepairs]

That's another way of doing things... 😉

[@dkaloupis75]

Good morning guys😂 first thing in the morning with LM and coffee....the benefits of being single

[@LMAutoRepairs]

😅 👍👍👍

[@jackiemay9471]

good morning Luis being a intermittent fault and a mates car i would have swapped left and right sensors gave him the car back to see if the fault moved but as the part was relatively cheap it was worth a punt and its out of your hair ps that bit of glass looks like a bit of granulated toughened glass from side windows not a bit from a laminated front screen which rarely breaks in granules

[@LMAutoRepairs]

😊 Could have done that indeed... Thanks! 👍👍👍

[@matejanosvarga4478]

Great video there again, really nice diagnostic process to learn from.

[@LMAutoRepairs]

Thanks! 👍👍👍

[@antonyjames744]

Do you know the resistance of a working sensor? Would it be an option to put a resistor in to either eliminate the fault or to even bypass the sensor permanently

[@LMAutoRepairs]

I am pretty sure that these are not that type of sensor... resistors will not do the trick... 👍👍👍

[@Markstevos]

Excellent diagnostic as usual. 👍

[@LMAutoRepairs]

Thanks! 👍👍👍

[@mindapothecary]

A long format video...super

[@LMAutoRepairs]

☺️ 👍👍👍

[@wackey3455]

Thank luis for sharing another cracking video

[@LMAutoRepairs]

☺️ Thanks! 👍👍👍

[@DeaneMeegan]

Hi i have same faults on my 2019 w205 c220d. I have changed 1 sensor but still same fault. Do you think it could be other sensor or wiring problem? And is there more than 2 of these sensors?

[@LMAutoRepairs]

What are the codes stored in the module? 👍👍👍

[@DeaneMeegan]

Right front crash sensor fault - open circuit or short circuit to positive (Current and Stored) Function 'Pedestrian Protection' left sensor fault - short circuit to ground (Current and Stored)

[@DeaneMeegan]

B27361/5 is for the left fault for perdestrian protection and B00951/5 is the one for the right front crash sensor

[@LMAutoRepairs]

Check wiring and connectors, if all good, it might be the sensors...

[@muratcicekdag1801]

Good evening, I have exactly the same problem with a broken sensor after an accident as yours. I have now replaced the sensor with a new one but I still have the same fault code as yours (communication with the left active engine hood sensor is faulty). I couldn't delete the error with maxisys. Maybe its only possible with the XENTRY diagnostic device? I also have a resistance value of 2,457Ohm on the sensor maybe is this too much.

[@LMAutoRepairs]

Have you checked wiring? The sensor you installed, was a new genuine sensor? 👍👍👍

[@muratcicekdag1801]

@@LMAutoRepairs the wiring looked ok for me and the sensor was second hand but from a shop that i knew. Should i check the Ohm of wiring?

[@LMAutoRepairs]

I would... That sounds like a wiring or sensor issue... If you swap the good one with the bad one, does the faults changes?

[@muratcicekdag1801]

@@LMAutoRepairs good Idea, thats the next step so i ll see Maybe the sensor is deffect what i bought from second hand shop 👏🏽👏🏽

[@macdesi4321]

Hey mate, im near Uxbridge.. is that far from you? I have the same heavy steering wheel issue on my w204 C Class. I might need your services.

[@user-di7rw7nd6j]

Good joob and nice repair you did itt😊

[@LMAutoRepairs]

☺️ 👍👍👍

[@HelderPutoPerformance]

Next time I will know what sensor to replace 😅😅

[@LMAutoRepairs]

😅 👍👍👍

[@bigry2471]

Great video Luis what model Autel scanner do you use Many thanks.

[@LMAutoRepairs]

MS908P... 👍👍👍

[@beckhanaydi8917]

В итоге какой датчик поменяли?

[@Oaky1978]

Hi I have the same problem maybe I will come to fix it for me ,where you live?

[@GraditelMacedonia]

Before ending this video...as i remember there was written REAR left/right sensor, until now you talking about front sensors!? Right???

[@LMAutoRepairs]

Rear sensor was never written anywhere... as far as I remember... The sensors are indeed the front ones as shown later in the video... 👍👍👍

[@GraditelMacedonia]

@@LMAutoRepairs Probably i mixed up something.

[@LMAutoRepairs]

☺️ Probably... 👍👍👍

[@neilmurphy845]

It looks like things are back to normal 😅 there's no fuel in it.

[@mrfishbulb7187]

It ain't got no gas in it. 😂

[@LMAutoRepairs]

😅

[@neilmurphy845]

@@mrfishbulb7187 😂😆

[@mrjambonbeurre9093]

hello, there is a place where we can contact you ?

[@LMAutoRepairs]

You just did... ☺️ 👍👍👍

[@jusb1066]

So if someone kicks your bumper .. a Mercedes is going to cost you a lot of money

[@LMAutoRepairs]

😅

[@dkaloupis75]

The rumor has it as follows "don't even dare to fart Infront a Merc"

[@LMAutoRepairs]

@@dkaloupis75 🤣🤣🤣

[@neilmurphy845]

He's very lucky that it didn't activate the system

[@LMAutoRepairs]

😊

[@richardkhoza2878]

Corona powered.

[@LMAutoRepairs]

🤪 👍👍👍

[@nuno7419]

Bom dia :}

[@LMAutoRepairs]

😊 👍👍👍

[@pontuspaulsson3435]

People dont have fancy diagnostic tools. Soo this is meaningless

[@LMAutoRepairs]

Fancy? 😅 If you want to fix cars, you need the tools... Just like in any other job... A bit of a meaningless comment yours...

[@JoeBWard]

is there a way to private message you please?

[@LMAutoRepairs]

In regards to?

[@JoeBWard]

@@LMAutoRepairs maybe working on my car. Distance depending. I have the same fault although my car wasnt involved in a accident. Plus i have one other fault. SRS related.

[@atefjerry712]

as always very good work

[@LMAutoRepairs]

☺️ Thanks! 👍👍👍