Worst problem to date.. Need some help

[Problem]

H7

car is w221 s320 cdi wirhout xenon, dipped beam h7 High beam h9
My h7 socket was Melted and damaged, and i Saw it has 1 Yellow wire and 2 Brown wires, unable to find the correct part number i purchased The socket for w210 h7, This has 1 Brown 1 Yellow wire.

The Melted socket was causing bad connection and Therefor canbus obc errors , in my case airmatic lamp and sometimes airbag lamp for 2-3 seconds.

Mechanic Said he Can cut OFF Old connector, splice The 2 Existing Brown wires together and then splice Them onto The new connectors single Brown wire without problems.
He did that, but now The airbag lamp is On constantly! I dont know if i should change The h7 connector On The other side The same Way aswell, or what The problem seems to be?

There Are no led Bulbs installed.

Fog light assembly is slightly Melted aswell from
Bad Bulbs, but The bulb Can stay in place and connector / wiring looks completley undamged!

I have hid installed , they were expensive and with canbus for new german cars.

I was BTW unable to find a connector for W221 with 2 Ground wires and 1 Yellow wires

I am thinking OFF adding Load resistors in The h7 Bulbs - and installing led Bulbs with canbus + Load resistors in The Fog to imitate a problem free scenqrio to cars computer...

Also, i know The srs and airmatic lights Are canbus errors since i once had led Bulbs installed in license and parking - same errors Came, switched to original - errors gone!

Going crazy please help
My problem started when i used some halogen xenon look Bulbs, they Melted my h7 connector (one side loooked fine though) and my Fog Light assembly, initally when i Removed The Bulbs (that were stück because OFF melting) then The errors began!
There Are no led Bulbs installed

 

[MancMike]

Are there any LED bulbs installed?

 

[Problem]

Are there any LED bulbs installed?

There were up until last Night, i put in normal Bulbs again after The mechanic changed The Melted h7 socket.

Im concerned that The new socket was The w210 h7 connector with only 1 Brown wire, original socket had 2 Brown wires, he spliced The 2 original Brown wires together and then spliced Them to The new connectors Brown wire, could This Cause issues - also because only one side is changed and other is original?

Before Changing, i had airmatic light and sometimes airbag turned On and OFF. Now airbag is constantly On and airmatic too.

I have tryed wiggling all wires from both headlights and forlights.

 

[Problem]

Are there any LED bulbs installed?

This hid kit is installed tho, but is descirbed AS 100% error free and compatibilty with Mercedes , also there is warranty 12 months
http://pages.ebay.com/link/?nav=item.view&alt=web&id=261157396469&globalID=EBAY-US

Im thinking off Changing The other h7 connector same Way AS The first Melted one, and then installing this:


http://pages.ebay.com/link/?nav=item.view&alt=web&id=361377742702&globalID=EBAY-US

Also Want to install error free h11 led in Fogs with an similar Load resistor.

I think it Will imitate The original volts/Watts to The car..

Am i totaly wrong?
Star could NOT help exept pointing to What componenst On airmatic and srs and showing falilure..

 

[Ted]

LoOkS TO Me liKe THE twO pROBlemS aRe UNCONnectEd.
i WOULD geT iT PuT onTO STAr anD RESolvED bY a COmpeTENT techNIcIAN.

i woULD alSO reTURN tHe lighING To oriGINal (wITh NEW CONnectoRs Of COurse) aND TAke it FrOm THERE.

 

[Problem]

LoOkS TO Me liKe THE twO pROBlemS aRe UNCONnectEd.
i WOULD geT iT PuT onTO STAr anD RESolvED bY a COmpeTENT techNIcIAN.

i woULD alSO reTURN tHe lighING To oriGINal (wITh NEW CONnectoRs Of COurse) aND TAke it FrOm THERE.

Ive had The car Connected to Star, and The codes Are saying y51 front left strut , and airbag is coallison sensor front left.

I know the problems Are related because i once had led Bulbs in license + parking, and theese 2 exact errors Came, once i Removed The Bulbs, error dissappered, up until i Added h7 and h11 halogen xenon look Bulbs in dipped beam also Fog light... They Worked fine and no errors, but when i Removed The Bulbs to check if all is ok ( 1-2 weeks after installing) The h7 dipped beam
Had Melted The socket, and The h11 had Melted The Fog housing ( no damage to wiring or socket) - so when i Removed The Bulbs , The errors started!

Now that i changed The Right side h7 socket (AS explained and descirbed above posts)
The errors Are Worse The airbag is now On constantly unlike before when it was only sometimes.

Bulbs Are back to original exept for The hid kit i have shown in link above.

Any advice for The complete descirbed problem?

 

[Problem]

LoOkS TO Me liKe THE twO pROBlemS aRe UNCONnectEd.
i WOULD geT iT PuT onTO STAr anD RESolvED bY a COmpeTENT techNIcIAN.

i woULD alSO reTURN tHe lighING To oriGINal (wITh NEW CONnectoRs Of COurse) aND TAke it FrOm THERE.

Friend ted. you say new connectors, i have changed one of Them.
I changed to The w210 connector AS i was unable to find h7 w221 connector (that had 2 Brown wires and 1 Yellow wire)
Do you know of correct Part / part number?

 

[Problem]

Should i try justanswer Mercedes specialist

 

[Ted]

It the wires and connectors from the w210 work, they will be fine.
In my opinion you need to get a diagnosis from a reputable specialist for the other issues (also worth checking your battery voltage).
Where are you? - someone on the forum may know somewhere near.

 

[grober]

Sounds like you have an earthing problem. [ Mercedes wiring codes designate brown as earth wires ] Often the headlights are earthed on the top of the suspension strut and its possible the " y51 front left strut , and airbag is coallison sensor front left." share the same earthing point. I would try to find where the the headlights are earthed on that side of the car in case there's a problem there. You may also get a clue from looking at the good headlight to see where those brown wires run to?

 

[Problem]

Sounds like you have an earthing problem. [ Mercedes wiring codes designate brown as earth wires ] Often the headlights are earthed on the top of the suspension strut and its possible the " y51 front left strut , and airbag is coallison sensor front left." share the same earthing point. I would try to find where the the headlights are earthed on that side of the car in case there's a problem there. You may also get a clue from looking at the good headlight to see where those brown wires run to?

Thanks ill try to check Earth wires!

Thing is The good headlight seemed to have a good looking connector The mechanic Said and Therefor was NOT changed The bad side is Right headlight that is changed , h7 connector from
W210 brand new , original 2 Earth wires were spliced into The new connectors single Brown wire.

Left side i Will try to Do same swap and also thanks

 

[Problem]

It the wires and connectors from the w210 work, they will be fine.
In my opinion you need to get a diagnosis from a reputable specialist for the other issues (also worth checking your battery voltage).
Where are you? - someone on the forum may know somewhere near.

Im Copenhagen NOT uk hehe

Battery voltage was fine 14.2 v or something according to Star

Ive Been to Maybe 4 mechanics and they all say its impossible led Bulbs Can Cause theese issues , i explained that i Removed led Bulbs months Ago and all problems Went away immidiatley and now they Are back after i used halogen xenon look Bulbs, they dont belive me hahah srs lights usually needs Star to turn OFF, it was On for a Month and when i Removed led bulb back then , it Went away immidiatley ..: they dont know anything im afraid only guessing from other owners or other with same issue solved Can help

 

[Problem]

My h7 connector had 2 Ground wires and 1 Yellow wire, when i changed The connector with The w210 new connector from dealer, it only Had 1 Ground and 1 Yellow wire, so The mechanic spliced The Existing 2 Ground wires together and then spliced Them to The new connectors Ground wire

I now have no led bulb or hid installed at all, everything is regular Yellow bulbs, and im still getting errors , airbag lamp is On 24/7 after mechanic changed The h7 connector - was it wrong to splice it The Way i explained above ? Should i change the other connector in same fashion to even it out? Thanks

 

[nb_racing]

What a mess.
You need to go back to basics and start fresh.
So,
Get the CORRECT bulb socket fitted by a GOOD automotive ELECTRICIAN, not just Dave under the arches. Modern cars are very sensitive to resistance and earths and something that might seem trivial could be causing your problem.
Also, think about why the connector melted in the first place. They don't just melt at random for no reason. Your under-lying problem could have caused the damage in the first place, and the shoddy repair is making the symptoms worse.
Get everything back to as it should be, clear down the fault codes and use that point as a starting point to diagnosing your faults. If you try to find faults when you know there is dodgy wiring you'll never get to the bottom of it.
It's like cleaning your car: you don't start by polishing a dirty car because you'll scratch it and make it worse. You wash the car, then polish.

 

[nb_racing]

Also, how do you know the connector was 2 earths? More likely 2 switched feeds and an earth...? Splicing an earth to a live feed won't do much good...

 

[Problem]

Also, how do you know the connector was 2 earths? More likely 2 switched feeds and an earth...? Splicing an earth to a live feed won't do much good...

Ive Been contacting Mercedes dealerships and they dont sell The h7 connector for w221 i am afraid.. All Ive Been able to find is The h7 connector for w210.
I installed Aftermarket halogen xenon look Bulbs in my dipped beam (h7) and also my Fog h11.
Having Them installed for 2 weeks i Wanted to check if all was fine, when removing The Bulbs and noticing The h7 sockets were Melted i changed back to normal Bulbs and next Day i started getting The errors in my car Like back when i had poor leds installed.

I have looked at my h7 connector and there Are 2 Brown wires and 1 Yellow wire, Ground wires Are Brown Ive Come to acknowledge.

Ive called several auto electricans and they have all Said its no problem to take the w210 connector and splice The Existing 2 Ground wires together to The single w210 connector.

Lights Are working, and lights Are looked in place..
But yeah ever since he changed one sides connector The problem
Got Worse in form of airbag is now On 24/7.

The mechanic is good, expiernced and expensive.

Perhaps you know of a part number for The Right connector?
Im going nuts ..

BTW i havnet bothered to consider The h11 connector in Fog because when removing The xenon look Bulbs, it plugged out Like normal and there Are no Signs at all OFF damaged or melting (probably because The bulb is inside Fog housing and The connector is plugged outside of bulb)

Perhaps i should install Load resistor Down there?

 

[Problem]

Im
Gonna try to change to The other sides connector aswell and im Hoping to even things out Like that?
Ive Been told Ground wires have no volts going through Them so if they Are spliced it should NOT Cause an issue? ... God Why cant Mercedes just sell a h7 connector with 2 Ground wires and a Yellow !

 

[Problem]

I dont Think h7 conecctor / wiring harness Is sold seperatley for w221...
Tho i Do belive it Can be changed with another Part AS long AS The new conecctor has 3 wires to it.
Ive found This On eBay:

http://pages.ebay.com/link/?nav=item.view&alt=web&id=171821321162&globalID=EBAY-US

And This:
http://pages.ebay.com/link/?nav=item.view&alt=web&id=351167735540&globalID=EBAY-US

The second link actually resembles my harness Very Much if NOT identical...

Am i On Right track, friends?

 

[nb_racing]

It's up to you what course of action you take, but chopping off the other connector and replacing that for one you know is wrong is just bonkers!

If it were my problem, I would either source a 2nd hand connector from a 221, or buy that one you linked to, get that fitted, then get the car on a star machine to properly diagnose the other faults.

Fault finding while you have known problems is impossible. It's like training for a marathon while you've got a broken leg... Surely you fix your leg first??

 

[Problem]

It's up to you what course of action you take, but chopping off the other connector and replacing that for one you know is wrong is just bonkers!

If it were my problem, I would either source a 2nd hand connector from a 221, or buy that one you linked to, get that fitted, then get the car on a star machine to properly diagnose the other faults.

Fault finding while you have known problems is impossible. It's like training for a marathon while you've got a broken leg... Surely you fix your leg first??[/QUOTE

Ive sourced for second hand h7 w221 connector and its merlely impossible.
But Well I am QUite sure that w220 h7 has to be same AS w221 pre facelift!

Thing is all mechanics and even Mercedes Benz have told me that a universal h7 connector spliced to The original wires is fine ..

Well im gonna visit scrapyards to find a w203 or w220 with halogen.. A

BTW... Airbag lamp turned OFF The other Day, On its own