Merc1

I fix one thing and another one is ready, I am telling you if I didnt have this forum, I would sell this car.

But, I love Mercedes, what can I say, it saved my life once, driving from Germany to Prague. Long story... Any other car beside BMW, I think it would of been a disaster..

Anyway, here is a problem just discivered, I came home logged on the net and looking for answer from the wise one's.

I changed my thermostat and water ran down the thermostat hole, I stuck a hose in the resorvoir, while car running and flushed out more water. Water was puring from the T-stat housing. Water was sprinkling slightly around the engine..more like MIST.

I Installed the T-stat and refilled and wiped the engine.

ALSO, I opened the airfilter to inspect and put the cover back on.

I took the car for drive, 50 Miles.. no problem.

I think maybe the problem below has nothing to do with the above situation, I dont know it could be, that's why I am asking for suggestions.

After driving for 50 miles as mentioned above , I came home, then after 2 hours took the car for drive again HERE is the problem.


1. Car felt loss of acceleration when taking off from stop or around low speed.
2. Car seemed to give a LITTLE jerk.. (Transmission)
3. No loss of acceleration at high speed 40-50 mph ( I think)
4. car seemed to miss VERY VERY little, when I started FIRST at idle and park, it went away after few minutes.
5. NOW THE CHECK ENGINE LIGHT CAME ON, on display and on the side of the display.

Went to Autozone and they read the codes: 4 Codes
p0173
p0170
p0730
p0700

Codes, were reset, however, the loss of acceleration comes and goes.

I came home and pulled out the codes, and saw the following:

P0173 Fuel Trim Malfunction (Bank 2)
P0170 Fuel Trim Malfunction (Bank 1)
P0730 Incorrect Gear Ratio
P0700 Transmission Control System Malfunction

Now, I am stuck.
I think p0173 and p0170 could be many thing, but MOST cases it is MASS air sensor. Few cases Vacuum Leak.

A. HOW DO I CHECK VACCUM LEAK?

Now, what about the p0730 and p0700, again all 4 codes came at the same time.

Autozone reset the code, car has 1/2 tank of gas and the CAP is on tight.

No Check Engine Light since than, it has been 2 hours and I drove the car 15 miles and shut off the car and restarted 2 times, since the code reset. But the car still loses on acceleration, and rarely very minor jerk on the transmission.

Maybe changing air flow MASS will take care of all 4, but I am worried about the p0730, p0700.

Thanks in advance, Since,I have very little knowledge about the Mercedes, this forum has helped me out a lot.

Thanks in Advance.

I guess my out of town trip is off...

zam2000

Here's from the Mercedes Service Manual

zam2000

Here's another one for code 0700

zam2000

Check your TCM (Transmission Control Module) and ATF pump to make sure nothing get spray to it

I can send you diagram of the transmission circuit if you need to. It's too big, I can't figure out how to post it here

Also, unplug your battery for couple hour (overnight is even better), plug it back in to have sensor reset

zam2000

From what you describe, look like one of the following two valves may be mess up with.

They should be right in front of the main fuse box. Lot of people wash their engine, only to see the car running monkey once these valves screw up.

Merc1

ZAM,

Thanks for taking time to lookup and post. You are truly a great person.

I will try to see if those thisng you mentioned are dry and snug.

I went to the car and I was looking at MASS, I discovered the big 5-6 " Tube or whatever it is called (Air Filter to Intake Manifold) is disengaged from the part that is going back towards the engine intake 3-4 inches just before it makes a right turn.
------- Rear Engine intake Snug fit to the engine, But can be pulled
-------
l l
l l
l l <----tube DISENGAGED just touching it loosely no clamp no fit
l l end of the Mass sensor Clamped good
llll Mass Air sensor
l l Clamp and fited good
l l
-----
l l Air Filter box
-----
Below is the explanation:

So..from the Air filter to Mass it is snug fit with a clamps, the 2nd end Mass part is also connected well.

**Problem is, I dont know if this is the way it supposed to be.. but that part after MASS is just touching the other part which continues to the engine 3-4 inches before it make a right turn towards the intake is Loose nothing connecting the two it is just touching it, if you touch it you can see inside Both pieces have ARROW impression <---- pointing to the 2 tubes ----><-----.... . I think it should have some sort of clamp, I tried to put the rubber into the other piece to make a connection, but it wont go in.. **

**further down the engine where it connect to the engine, I noticed I can turn that piece, I dont know if there is also a clamp in the back of the engine. I can even pull it out. However, it is inside and a snug fit. But it can be pulled out by hand.**

If you take the engine MB LOGO plastic piece off you will see what i am talking about in the back rear intake manifold.

Any suggestion, before I head out to the dealer? And start changing MASS, p0173, p0170... and p0700 p0730 code (transmission)

Could all this be realted to the part not being connected for all 4 code, or this is just another seperate thing..


Thanks again.

Merc1

If you look at the arrow I made top left, thats where it is seperated, rubber part meeting hard Plastic, no clamps no coupling, I dont know if it is missing anything or is supposed to go into the plastic..tried putting in th eplastic..wont go inside it. Just touching freely both pieces.

E-Klasse

A leak after the MAF sensor might be causing you problems. The system should be tight. I would fix that first and then drive it again to see if the slugishness goes away. Don't just toss another sensor in because they are not cheep.

Merc1

1 Problem solved.

Changed the tube from the Air intake to the mass sensor, ( about 3 feet long) reseted the code, every thing is back, power and no problem shifting. $78 list my cost $48

Thanks all

Merc1

spoke too soon

This what happened.


Thanks for all of your input. I got a problem, please help if you can.

1. I changed the Air Intake hose as you know already from above. I reset the code. Drove for 12 miles light stayed off, came home, then left home and drove for 7.6 miles so the total of 19.6 miles and the light came on again.

2. went to Auto zone had the code read, this time only 1 code as opposed to yesterday's 4 code. 1 code was p0107.

3. reset the code and drove for 24 miles, no check engine light.

I remember someone telling me something within 20 miles it should reset (trim bank 1). Maybe the light came on within 20 miles earlier after replacing the tube is normal?

Or do you think, I should go ahead and order the MASS Sensor.

Car does have very Slight pickup from 0 mph to accelerate.

I will wait for your answer, than order MASS sensor if necessary.

Thanks a million, you all have been very helpful.

E430 George

Merc1, I am having a very similar problem you are. Had the Mass Air Flow Sensor (MAF) replaced under warranty after the check engine light came on. And even though the check engine light went away, I am experiencing the same problem a month and a half after the MAF was serviced.

Here is the link to the thread I started before I read yours:

https://mbworld.org/forums/showthrea...threadid=48647

Merc1

GEORGE,

Since your car just came out of the warranty and you told them about this problem. Go talk to service advisor, most likely they will fix it for free. But hurry.

let us know what was the problem.

Merc1

This is an update from my last post 2 back (above)

Drove 109 miles afternoon and night, Mixed driving, highway and local. LIGHT did Not come on.

It appears to drive normal. Based on your expertise, you think the light came on after fixing the intake tube was just mass was being reset?

When intake was apart light came on, Reset while broken, light came on within 20 miles 4 codes showed.

When I changed the intake tube and drove for 19 miles Light came on showed only 1 code.
Reset the light again (2nd time since fixing the tube) drove 109 miles no light. Is it fixed?

Thanks

E430 George

Thanks for the quick response Merc1; I will take the car to the dealer in the next couple of days. My service advisor is very helpful and I think I would be able to work something out with them. I am just hoping it's one of the sensors or an intake/exhaust system etc. and not a transmission. I will keep you updated on what happens.

P.S. Hope everything works out with your car.


Also, I was wondering what year and engine model is your W210 and how many miles were on it when you started to experience this issue.

EddieGTP

Where do you bring your Benz for service?

Merc1

George.

1998 e320 76 k

Paxfobiscum

E430 George,

Who is your MB dealer in NYC and what specifically is the name of your service advisor. I am interested because my dealer has given me so much headaches from backjobs that never seem to stop.

thanks a lot.

Merc1

Just wanted to update.

Drove total of 180 miles and no light.
Car runs normal.

I bought a MASS original from MB delaer. Now I need to take a loss and Sell it since, it was just the tube as mentioned above.

Will let you know if the check engine light comes on.

michakaveli

I've noticed that anytime I had a "CEL" come on in th ewinter, it took about 100 miles till the light went away on it's own. But that was most likely due to the extremely cold winter we had and I believe the EGR system was triggering the "CEL".

E430 George

Update on the problem:

Went to the dealer spoke to advisor, they are booked till October, so amde an appoitment for then.

She suggested that the problem could be due to the catalyc (sp?) converter. Does anyone know hwo to check if this is true, and do the symptoms described sound like the converter is malfunctioning.

paomien

paxfo - where do you bring your car for service? Silver star?

Paxfobiscum

[QUOTE]

Yup, Silverstar is the dealer. My SA is a really nice lady (and good looking too) but I don't know about her mechanics though. Have had to bring the car back for a backjob everytime after a simple job. Now I have to bring it back to "recode" the left rear mirror which is not working with the seat memory. The mechanic also screwed up the mirror controls and reversed the directions. So whenever I want to adjust the mirror to face up I have to push the switch down...

paxfo...

EddieGTP

Sounds almost like Manhattan MB = 2 times usually gets the repair done right.

But I do like the service advisor and the general attitude, so that sort of makes up for other things.

Whitey

Hey Merc1 , are you still looking for a lower temp thermo? My guy is still searching around town......I think.

Merc1

UPDATE:

My lights came back on again few weeks back, afterall I did use the new MASS.

I am so glad I didnt sell it, good news is I got the MASS from the E BAY New for $120, dealer wanted $1 million dollor:p just kiddding, somewhere around $350.

I drove the car for almost 3000 miles, and light is off and car runs great.

(I am monitoring the oil situation will update soon)

By the way, just a tip on the engine light, NEVER OVER FILL YOUR GAS TANK.

Looking for a project on my car, I am bored.