04 C180 New to merc

[mDx]

Fist of all I want to say hello to everyone, I am new to this forum same as new to merc owner.
Don't want to call me self a mechanic yet however i did a college work and never did go to any garages yet!!
I usually now have 2 luxury cars 04 Mercedes 180 Kompressor auto, and Lexus is200.
Now lets go further to it! I never had any German car's yet especially Merc
I brought this car for pretty cheap 700Euro, brought because I saw that dvd were at cost of 600 pounds.
The owner is in his middle/old age. Gave me service book but its pretty empty. Its seems it never was serviced hovewer old owner said that it was looked after and never hit pedal on d ground. When i checked the engine after i already brought a car the cap fas full of cream/foam or whatever u call it, Sign of headgasket blown most of times. But told me he wasnt driving it a lot, 4-10 km's per day!
ofcourse i did not panic its 700euro anyways, i could get more on parts.
I flushed all of that think seems oil was ok and no cream come out, however the place where the flush nut goes it was a bit cracked and i thought maybe water got from there to engine and thats how cream appeared.
But lets go futher, I did checked if the coolant didn't go lower no it didnt' no smell of petrol in coolant or any sign of oil, so i took it for a good spin 100mile, looks like i dont have that cream on my engine cap anymore!!! wohoo.
But i still have some errors on my screen.
1: SRS light I brought this with it. RESISTANCE in ignition circuit r12/11 witch is probably Passenger seat! Plug it back onto it it was unplugged. After pluged and deleted got another error B48 PASSENGER seat occupied and child seat recognition is foulty, i guess i have to change that sensor.
2: SRS again R12/12 Circuit in right rear side airbag??? Is that in rear doors or the roof??? Cant fint that one.
3: Oil level sensor foulty, only got that today? hovewer i took it out when changed oil to clean it a little. But probably thats what made it worst? Change it or there is other way?
4: witch is very interested error, Change oil, what? I just changed it.. maybe its a sign that it got picked some of cream and wants new oil again?
Thanks in advance
Eddy!!

 

[mDx]

Bump is this forum dead?

 

[markjay]

1. It's the Front Passenger Seat Occupancy Sensor - a mat with lots of small switches that fits under the seat cushion.

It's purpose is to prevent the airbag deploying unnecessarily if no one is seating in the front seat.

Buy part (~£130), remove seat, dismantle, replace mat, refit seat, delete error code.

Alternatively there's a £5 thingy on eBay that fools the SRS into thinking the sensor is OK - but personally I would not use it.

(Ignore the reference to 'Children' it's another optional system related to that, but the same error comes up whether that system is fitted or not).

BUT - always check with MB STAR - other diagnostic readers may not always give the correct fault.

 

[markjay]

4. Did you reset the service indicator in the instrument cluster?

 

[markjay]

mDx... are you alive?

 

[mDx]

Sorry for late answer yes i did changed the service intervals, but i cannot check the oil level at the moment as the sensor is foulty changing it today. I hope its not because i used 5w30.. So i have to change the whole airbag unit on the passenger side under the seat, i dunno about that this diagnostic is **** when it costs 700eu alone and has merc program.
What abour R12/12 squib?

 

[mDx]

Markjay are u alive?

 

[markjay]

Ha ha... barely... actually been to hospital yesterday but I'm fine now

I meant to say that MB STAR gives the most accurate diagnosis, I have an Autel MaxiDiag with Merc module so can diagnose by myself, but before buying parts etc I usually take it to an MB specialist with STAR to confirm.

 

[markjay]

5W-30 is fine, as are 5W-40 and 0W-40.

But oil should be to correct MB Spec Sheet: either 229.5 / 229.3 for petrol engines and for Diesel engines without DPF, or 229.51 / 239.31 for Diesel engines equiped with DPF.

Which oil did you use?

 

[markjay]

This is what the Front Passenger Seat Occupancy Sensor looks like:

 

[markjay]

And this is the workaround (which I do not recommend...):

[YOUTUBE]DYFhoY3dLgU[/YOUTUBE] [YOUTUBE]WKSyTEHmlQI[/YOUTUBE]

 

[mDx]

I did not see which oil i used but it was recommended by the part shop! but i don't trust them too as they don't know a thing! It was very cheap for 5w30 fully synth! ASPEA confirmed! and i have same diagnose tool as u

 

[mDx]

Anyways sir, can you please tell me the reason why would u not recommend this?

 

[SLKNick]

Because it is a bodge. If this is not fixed properly it affect the correct operation of the whole airbag system and in the worst case cause it not to deploy when required. How much value do you place on your life or those of your passengers?

 

[markjay]

Plus your insurer might not be impressed with this mod, to say the least.

Yet I guess that if some people are selling it then some people are buying it... but as said, I would not fit it in my car.

 

[markjay]

Because it is a bodge. If this is not fixed properly it affect the correct operation of the whole airbag system and in the worst case cause it not to deploy when required. How much value do you place on your life or those of your passengers?

As above.

The main issue with SRS is that there is no way of testing it... any full test will be destructive by definition. So there is no telling what the bodge might actually do in an emergency.

 

[mDx]

is there any clear guides on removing seat airbag sensor properly?

 

[markjay]

Plenty, if you Google Mercedes Front Passenger Seat Occupancy Sensor replacement. The process is similar to many models.

 

[mDx]

Actually I came to conclusion, how can this thing go bad, its a sensor not movable unit. until you hit it. Its electrical unit which only the wire can go bad? what else on these can go bad?

 

[markjay]

...Its electrical unit which only the wire can go bad? what else on these can go bad?

That's exactly the point... no one knows for sure. But it's your car and your call...