[Long Post] Some alarming questions, some minor updates and minor.1993 300CE W124.052 - PeachParts Mercedes-Benz Forum

gabzor · #1 02-17-2012, 09:56 AM

So guys its 6:30 am right now, and i've pretty much been trying to clean the car up a bit since about 1 am, because i couldn't sleep..
anyways ended up trying to take out the seats (man they were alot harder than my sedan) [and i could not get them fully out because i had no idea how the vacuum connections worked] and jesus christ the plugs for the coupe.. i swore so much i don't i'll have to swear for a while.. and good thing my seat motors and switches didn't die *crosses fingers*

i couldn't take a pic as my phone was pretty much dead, and i didn't care cause my girlfriend was asleep, and my boss.. who cares about my boss!! (pics i took later with phone, as it was charging while i was working]

it was horrible.. dirty and grimey would not even begin to describe it.
anyways i did as much as i could, well i didn't think it was going to be that bad, but man it was.. thank god i didn't find a condom, but i found all kinds of gunk, and bullets... yes bullets..
so i spent about 12$ vacuuming out everything i could, even the trunk, below the spare, even the engine bay, for the leaves and rocks..
and i swear i vacuumed out about 5lbs of rocks never again will i buy a neglected car.. just cause it had some receipts

anyways.. as i was putting the seats back on, which took a while, i did forget to mention i made one of those DIY code readers, which worked great, till i broke it.. i threw it somewhere in the trunk, and it got crushed and the solder ends broke off cause my tools.. no biggie.. mine has the little pushbutton and led built in..

codes are
5 Exhaust gas recirculation faulty - [probably because i'm missing a smog pump ]
10 Voltage at mass air sensor too high/low - [i think its cause the pic below]
11 Tn-signal (rpm signal ) at engine control module faulty - [no idea, but it cleared and stayed away even when i drove, the others stayed]
17 Data exchange malfunction between individual control module [no idea]
19 Injectors circuit open or circuit short emission control module adaptation in engine
control module at limit [doesn't sound good, but no idea]
25 Knock sensors or engine control module faulty [must be oil pressure sender going?]

(had a couple o2 sensor faults, but they were coming and going, probably 02 sensors going anyways)

another mention is my combination relay seems to fix itself, and die again, have planned to replace it soon.

this harness seems to be covered in "pvc wrapping tape" all over, i don't know how i missed this when i was buying the car :|
anyways, i took some of the tape off to see what its hiding, and bam.. raw wires.. they weren't even soldered or connected which worries me... and it was connected to this

right to the maf or whatever the little electronic plug is, connected to the air filter and was wondering why theres a zip tie there.. which even worries me more!

that seems to be a wire running from the battery, but it had a date so i was wondering if it is my wiring harness.

the date was 20 08 92.. which means its probably an original wiring harness if it does.. weird thing is my car's date says may, 1993, so i don't know if the pipes are plastic/steel.. for i think the gas lines? and i have no idea why the ovp isn't behind the shield and hanging like that, thats how the car came..

and some minor questions, how do you know if your window regulators are out? is it cause they squeek and rattle and click? or do they just need lubing?

can i use a sedan seat on the coupe just for the passenger's side, as that side doesn't need to roll back and its completely worn

how do i check if my gas tank is leaking? my gas gets lower everytime i sit in it for some odd reason.. i know id have to probably pull the gastank out, but doesn't gas evaporate right away?

how would i take off the passenger rear seat bottom and top? i tried pulling the tabs, but their so stiff they wont budge.. i think ill try when i get my breaker bar..

anyways.. i messed up.. YET AGAIN i bought another cheap expensive mercedes.. and yes i know the quote.. never again! i shall shop around till the last from now on..

but i have decided to keep the car to learn some diy for the m104 engines, and its not too bad as a daily (well it drinks alot of gas) but its still a good driver imo..
i'd sell it, but i have no idea how much i can get, and its going to be hard for me to afford even more than i already can't (i just got a root canal) so yeah its staying i guess..

i have my slightly smoked facelift tails that i'm going to have to wash soon, and put em on..

well thats it for now.. thanks guys all the info will be appreciated.

JamesDean · #2 02-18-2012, 02:14 AM

Well that harness looks lovely. Is that the main engine harness? It looks like you'll need to buy a new harness. They're about $750. The 93-95 era cars I think had insulation issues hence your mess of tape and god only knows what else. That should be the first move to replace the harness. If you get me your vin number I can get you a part number for the harness. I think there were two different ones based on serial number. All of those errors could be coming from the bad harness.

Window Regulator - if the window has trouble going up/down as in shakes, gets stuck, jiggles, either the regulator is loose or broken. You'll have to take off the door panel and check it out.

Seats - I've no idea.

Gas - You'd notice a puddle or a spot on the driveway or under the car. Place some clean cardboard under the trunk and under the engine bay. Perhaps your fuel level sender is wonky and needs replaced/cleaned

The fact the car is using a lot of gas might be related to the bad wiring harness. The poor engine control unit is just spinning around in circles confused as ****.

I think thats first order of business--replace the harness.

gabzor · #3 02-18-2012, 12:21 PM

Quote:

Originally Posted by JamesDean

Well that harness looks lovely. Is that the main engine harness? It looks like you'll need to buy a new harness. They're about $750. The 93-95 era cars I think had insulation issues hence your mess of tape and god only knows what else. That should be the first move to replace the harness. If you get me your vin number I can get you a part number for the harness. I think there were two different ones based on serial number. All of those errors could be coming from the bad harness.

Window Regulator - if the window has trouble going up/down as in shakes, gets stuck, jiggles, either the regulator is loose or broken. You'll have to take off the door panel and check it out.

Seats - I've no idea.

Gas - You'd notice a puddle or a spot on the driveway or under the car. Place some clean cardboard under the trunk and under the engine bay. Perhaps your fuel level sender is wonky and needs replaced/cleaned

The fact the car is using a lot of gas might be related to the bad wiring harness. The poor engine control unit is just spinning around in circles confused as ****.

I think thats first order of business--replace the harness.

actually the harness is in pretty good shape, according to the previous owner rats chewed it up and he attempted to repair it.. yeah right

he just put pvc tape all over it i really don't know how i didn't notice! :|

my vin is WDBEA52EOPB979136 well i was looking at an ebay option, or something from iaai or something of that matter

the fact that my mechanic, mr.mb who is rated so high said that its no big deal... is a sad story..

hmm most of my windows are good than i think, they just need some greasing

JamesDean · #4 02-18-2012, 03:49 PM

You should take a look at various points on the harness. Look near the packs where the spark plugs are, look near the temp sensors. Open up the outer insulation and see if you see cracking/deterioration. If you do then time for new harness without question. This problem effected 124/140s from 92-95 or so. My 201 escaped this problem.

PeachPartsWiki: W124 Engine Wiring Harness Replacement

The part number for the harness is

That PVC tape job is the ****tiest job I've seen. I had a squirrel or something chew though my passenger headlamp/running lamp wire up near my battery once.

My buddy bought a 93-300E and it needed a head gasket done. My mech wouldn't touch it without the harness being replaced (the harness was infact bad). Once you start moving those bad harness around theres no telling what damage will be done.

The harness is about $750 new on XXXX

timmyr · #5 02-19-2012, 06:32 PM

a little info on the wiring harness dates and what they mean:

see post #23:
http://www.peachparts.com/shopforum/general-information/149851-94-e320-wiring-harness-id-2.html

and

see post # 6:

http://www.peachparts.com/shopforum/tech-help/276712-94-e320t-problems-where-do-i-start.html

and post #5:
http://www.peachparts.com/shopforum/tech-help/271904-95-e320-broken-upper-intake.html

gabzor · #6 02-20-2012, 02:24 PM

http://www.peachparts.com/shopforum/tech-help/313114-my-pos-ce-stalled-had-get-towed-today-%7C.html

james refer to the link above as its more updated.., look at the job he did once i took off the insulation.. smh WHY DID I BUY THIS CAR!! haha