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Registered
R129 sl320 '99 / W201 190E '90
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1,016 Posts
Discussion Starter #1
with 100000 miles
Hi again,
My car was serviced 6400miles ago (oil service due in 3600 miles). Today my oil light came on - I pulled into a petrol station and checked the level - nearly empty - topped it up by 1L of oil.
I own the car three years -it does get intermittent puffs of white smoke from the exhaust when in idle, maybe moreso on these cold mornings ,perhaps much more at the moment - I also have always had a *rough idle - my mercedes mechanic agrees the smoke is disconcerting but that the engine is good and he can't find fault with it. He acknowledges the idle too but since I don't have the cash to let him spend days trying to find the problem him fixing it isn't an option. The car is well really well maintained but I haven't been able to sort out the rough idle.
So,
I have read that the M112 is well capable of burning oil but I would like to drive assured that I won't have to buy spare litres of oil whenever the car decides - - Why the low oil level? Why the rough idle? Is there a link between the two? PLEASE HELP ME FIX IT
Thanks please thanks please please thanks
*Work done in attempt to smooth out the car- NO FAULT CODES SHOW
Oil/filter
Air filters
Spark Plugs
Ht Leads
MAF sensor
Removed egr valve and throttle body and cleaned replaced relevant gaskets
Valve cover gaskets
CPS (went faulty)
Fuel filter
Breather hoses from valve covers to intake
Engine mounts front and rear
three fuel additives and one pre service oil additive

Separately - Gearbox has been rebuilt.

Kind Regards,
DArragh
 

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Registered
05 C215 CL 500, 96 SL 500 PANO,96 W124 220CE,03 Smart 450 Cabrio, 96 W124 220CE, 07 Ford Transit!
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431 Posts
who does your servicing Darragh? I know that if i had done all this and wasn't happy i would change mechanic. I travel to castlecomer for servicing because he is the only one i trust and is truly passionate about mercedes
 

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Registered
R129 sl320 '99 / W201 190E '90
Joined
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1,016 Posts
Discussion Starter #3
Tommyboy40,
I do most of the work myself and I have fixed many things all by myself, I have been through several mechanics, I have one that I trust now and he is really good and honest and qualified and even drives the same car as me.. He is at a loss unless I leave the car with him and I don't have the cash to pay for that and he feels he might not even find the cause.
Kindliest regardations,
Darragh.
 

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Registered
05 C215 CL 500, 96 SL 500 PANO,96 W124 220CE,03 Smart 450 Cabrio, 96 W124 220CE, 07 Ford Transit!
Joined
·
431 Posts
Tommyboy40,
I do most of the work myself and I have fixed many things all by myself, I have been through several mechanics, I have one that I trust now and he is really good and honest and qualified and even drives the same car as me.. He is at a loss unless I leave the car with him and I don't have the cash to pay for that and he feels he might not even find the cause.
Kindliest regardations,
Darragh.
Is your mechanic looking for a hardtop? I'll ask my guy and see what he says
 

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Registered
R129 sl320 '99 / W201 190E '90
Joined
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1,016 Posts
Discussion Starter #5
Do ask your mechanic in case, thanks - is he expensive by the way..
My mechanic has black and black hard-top - now he might go for a black pano...
darragh
 

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Registered
'97 SL500, 06 Subaru Outback, LL Bean 3.0
Joined
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735 Posts
with 100000 miles
Hi again,
My car was serviced 6400miles ago (oil service due in 3600 miles). Today my oil light came on - I pulled into a petrol station and checked the level - nearly empty - topped it up by 1L of oil.
I own the car three years -it does get intermittent puffs of white smoke from the exhaust when in idle, maybe moreso on these cold mornings ,perhaps much more at the moment - I also have always had a *rough idle - my mercedes mechanic agrees the smoke is disconcerting but that the engine is good and he can't find fault with it. He acknowledges the idle too but since I don't have the cash to let him spend days trying to find the problem him fixing it isn't an option. The car is well really well maintained but I haven't been able to sort out the rough idle.
So,
I have read that the M112 is well capable of burning oil but I would like to drive assured that I won't have to buy spare litres of oil whenever the car decides - - Why the low oil level? Why the rough idle? Is there a link between the two? PLEASE HELP ME FIX IT
Thanks please thanks please please thanks
*Work done in attempt to smooth out the car- NO FAULT CODES SHOW
Oil/filter
Air filters
Spark Plugs
Ht Leads
MAF sensor
Removed egr valve and throttle body and cleaned replaced relevant gaskets
Valve cover gaskets
CPS (went faulty)
Fuel filter
Breather hoses from valve covers to intake
Engine mounts front and rear
three fuel additives and one pre service oil additive

Separately - Gearbox has been rebuilt.

Kind Regards,
DArragh

Car Exhaust Smoke? How to troubleshoot car smoke.
Reader Question: My car frequently smokes from the tailpipe; does this mean I need an engine overhaul?
Thank you, Don.

Dear Don,

Good question Don. Smoke coming from the tailpipe is not good news, but does not necessarily mean the engine needs rebuilding. First, you need to determine what color of smoke is coming from the tailpipe. The three most common colors of smoke that can be emitted from the engine and billow from the tailpipe are as follows:


Auto Motorcycle Home Life Health

White smoke: White smoke is caused by water and or antifreeze entering the cylinder, and the engine trying to burn it with the fuel. The white smoke is steam. There are special gaskets (head gaskets are the primary gaskets) that keep the antifreeze from entering the cylinder area. The cylinder is where the fuel and air mixture are being compressed and burned. Any amount of antifreeze that enters this area will produce a white steam that will be present at the tailpipe area.

If white smoke is present, check to see if the proper amount of antifreeze is inside the radiator and the overflow bottle. Also check to see if antifreeze has contaminated the engine oil. You can look at the engine oil dipstick, or look at the under side of the engine oil filler cap. If the oil is contaminated with antifreeze, it will have the appearance of a chocolate milkshake. Do not start the engine if the oil is contaminated with antifreeze, as serious internal engine damage can result.

How did antifreeze get in the oil or cylinder in the first place? The engine probably overheated and a head gasket failed due to excessive heat, thus allowing antifreeze to enter the cylinder (Where it is not meant to be).
 

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Registered
05 C215 CL 500, 96 SL 500 PANO,96 W124 220CE,03 Smart 450 Cabrio, 96 W124 220CE, 07 Ford Transit!
Joined
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431 Posts
Do ask your mechanic in case, thanks - is he expensive by the way..
My mechanic has black and black hard-top - now he might go for a black pano...
darragh
Don't know whether he is expensive or not, so far he has done a gearbox oil and filter change, 2 services, all filters and he still won't take any money. I took these photos in his yard last time
 

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Registered
R129 sl320 '99 / W201 190E '90
Joined
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1,016 Posts
Discussion Starter #8
What's the deal with all the lovely alfresco cars - what is his name - why do I think I recognise the place? I doubt I'll go that far up the country but if I was passing some day-
Darragh.
 

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Registered
05 C215 CL 500, 96 SL 500 PANO,96 W124 220CE,03 Smart 450 Cabrio, 96 W124 220CE, 07 Ford Transit!
Joined
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431 Posts
He's Ned Kelly, He's about 20 mins from abbeyleix, All those cars are either his or customers, some laid up due to the crazy tax, some to rot. Tbh I spoke to some Cork guys, Des golden etc but you know how passionate Ned is. For a little place at the side of the road he has 6 mechanics!
 

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Registered
R129 sl320 '99 / W201 190E '90
Joined
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1,016 Posts
Discussion Starter #10 (Edited)
Tommyboy40,
I dealt with him years ago for a part for a 107 - from my limited dealing with him (and his wife?) he's a lovely man, old style trusting person who knows his stuff. I spotted what I think was your car the other day in Cork with distinctive black pano looks great as does the rest of the car.
Kindliest regardations,
DArragh.
 

·
Registered
05 C215 CL 500, 96 SL 500 PANO,96 W124 220CE,03 Smart 450 Cabrio, 96 W124 220CE, 07 Ford Transit!
Joined
·
431 Posts
Tommyboy40,
I dealt with him years ago for a part for a 107 - from my limited dealing with him (and his wife?) he's a lovely man, old style trusting person who knows his stuff. I spotted what I think was your car the other day in Cork with distinctive black pano looks great as does the rest of the car.
Kindliest regardations,
DArragh.
I spotted yours too on macurtain st, i was parked two cars behind. It always seems strange to see another and i always chat to the owner. that door card must drive you demented! I have a mate who works for MB in germany, I'm waiting till i have a big list to see how cheaply i can get bits. I'll check out a price on replacements. Meantine I have the wis and alldata if you want a copy
 

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Registered
05 C215 CL 500, 96 SL 500 PANO,96 W124 220CE,03 Smart 450 Cabrio, 96 W124 220CE, 07 Ford Transit!
Joined
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431 Posts
PS. It's him, his daughter, two sons and 3 other mechanics
 

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Registered
R129 sl320 '99 / W201 190E '90
Joined
·
1,016 Posts
Discussion Starter #13 (Edited)
Tommyboy40,
I got a cheap ebay wis disc and eventually got it onto a computer with the appropriate operating system and it is ok but so awkward and limiting and primitive with desperate black and white blurred photos - if you have a more up to date version if there is one i would gladly receive a copy, thank you - for which I could offer you as token gesture a burn of the golden horde or blue in heaven cd perhaps.
The door card is off for a replacement speaker I am expecting from bose soon.
I am getting good at removing door hardware.
I do like cheap parts - let me know thank you.
regards
DArragh.
 

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Premium Member
Joined
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9,274 Posts
Car Exhaust Smoke? How to troubleshoot car smoke.
Reader Question: My car frequently smokes from the tailpipe; does this mean I need an engine overhaul?
Thank you, Don.

Dear Don,

Good question Don. Smoke coming from the tailpipe is not good news, but does not necessarily mean the engine needs rebuilding. First, you need to determine what color of smoke is coming from the tailpipe. The three most common colors of smoke that can be emitted from the engine and billow from the tailpipe are as follows:


Auto Motorcycle Home Life Health

White smoke: White smoke is caused by water and or antifreeze entering the cylinder, and the engine trying to burn it with the fuel. The white smoke is steam. There are special gaskets (head gaskets are the primary gaskets) that keep the antifreeze from entering the cylinder area. The cylinder is where the fuel and air mixture are being compressed and burned. Any amount of antifreeze that enters this area will produce a white steam that will be present at the tailpipe area.

If white smoke is present, check to see if the proper amount of antifreeze is inside the radiator and the overflow bottle. Also check to see if antifreeze has contaminated the engine oil. You can look at the engine oil dipstick, or look at the under side of the engine oil filler cap. If the oil is contaminated with antifreeze, it will have the appearance of a chocolate milkshake. Do not start the engine if the oil is contaminated with antifreeze, as serious internal engine damage can result.

How did antifreeze get in the oil or cylinder in the first place? The engine probably overheated and a head gasket failed due to excessive heat, thus allowing antifreeze to enter the cylinder (Where it is not meant to be).
I had absolutely proven, the hard way, that exhaust smoke cannot be known from sight. Smoke "colors" is something that should be on mythbusters. Most materials can and will produce blue, white, black or gray smoke depending on conditions and "infinite" mixture possibilities. In my case, gas smoke was thick and pure white and looked just like steam. That simply meant it was warm or hot but did not burn. Gas smoke can also be bluish and so can steam with certain conditions. It better to hold your hand in the stream and then smell it and feel it than it is to guess by color.
 

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Registered
'97 SL500, 06 Subaru Outback, LL Bean 3.0
Joined
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735 Posts
I had absolutely proven, the hard way, that exhaust smoke cannot be known from sight. Smoke "colors" is something that should be on mythbusters. Most materials can and will produce blue, white, black or gray smoke depending on conditions and "infinite" mixture possibilities. In my case, gas smoke was thick and pure white and looked just like steam. That simply meant it was warm or hot but did not burn. Gas smoke can also be bluish and so can steam with certain conditions. It better to hold your hand in the stream and then smell it and feel it than it is to guess by color.
What they didn't tell you is gas smoke is white if it consists mainly of unburned fuel; it's not really smoke, it's "gasoline steam". Actually, the white "smoke" from a coolant leak is also steam, so you're supposed to recognize the "gas steam" from the smell, which isn't so easy with the other colors.
 

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Registered
R129 sl320 '99 / W201 190E '90
Joined
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1,016 Posts
Discussion Starter #16 (Edited)
alchemy and mlrb2113,
thank you for the interesting colour of smoke/steam info.
When I hold my hand at the exhaust tip it is odourless and wet and probably H2O?? Also, the coolant level is correct, not bubbling and the oil from the dipstick is uncontaminated (as confirmed by an experienced mechanic friend of mine). The oil cap doae have a slight amount of not so much choc milkshake but more like espresso on its underside and slightly around the rim. No codes from proper star machine show a problem. I'll book it in for a compression test but my MB specialist thinks it is unnecessary (having a fair idea of the car and having changed the spark plugs 8 months ago)

Sometimes I get the smell of petrol from engine bay and from the exhaust --unburned? I try not to think about fuel economy as I am safer in denial about it (€1.32 per litre here in Ireland) but if I was a betting man I would say she is maybe harder on the juice than she was....
obvious next step for this very amateur 129 owner?
Kindliest regardations and proficient logorithms,
Darragh.
 

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Premium Member
Joined
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9,274 Posts
alchemy and mlrb2113,
thank you for the interesting colour of smoke/steam info.
When I hold my hand at the exhaust tip it is odourless and wet and probably H2O?? Also, the coolant level is correct, not bubbling and the oil from the dipstick is uncontaminated (as confirmed by an experienced mechanic friend of mine). The oil cap doae have a slight amount of not so much choc milkshake but more like espresso on its underside and slightly around the rim. No codes from proper star machine show a problem. I'll book it in for a compression test but my MB specialist thinks it is unnecessary (having a fair idea of the car and having changed the spark plugs 8 months ago)

Sometimes I get the smell of petrol from engine bay and from the exhaust --unburned? I try not to think about fuel economy as I am safer in denial about it (€1.32 per litre here in Ireland) but if I was a betting man I would say she is maybe harder on the juice than she was....
obvious next step for this very amateur 129 owner?
Kindliest regardations and proficient logorithms,
Darragh.
Odorless wet exhaust is perfect. I personally have never had a "perfect" exhaust odor on an MB. Usually it's pungent at least. Its hard to tell sometimes how much "wet" is too much though. Water is a necessary chief componet of combustion. My last bad head gasket did not give noticeable extra steam from the exhaust but it did continually bubble in the radiator and build pressure. That meant the power stroke pressure or comprsssion pressure was getting into the cooling rather than the cooling sucking or pressuring into the cylinders.
The time before, I had it both ways. Foaming and bubbling at the radiator and heavy visible steam from the exhaust even in hot weather. I think I could even smell the sweet odor of glycol from the exhaust.
 

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also, traces of a little water, or oil water slurry, on the oil cap or on the upper part of the dip stick means nothing. At the very least you can get that by shutting your car off, and allowing it to cool which can suck in humid air which evapoartes it when warming up again to a cooler point where pressure excapes and it condenses there.
 

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2000 SL320, 2001 CLK320
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2,364 Posts
White smoke

White vapour from the exhaust can also be caused by brake fluid leaking into the servo unit and then sucked into the inlet manifold. Have a compression test done - this will clarify your problem. Trust you are also using a high grade quality petrol. Loss of coolant and over heating will indicat head gasket problems.
 

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Premium Member
Joined
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9,274 Posts
White vapour from the exhaust can also be caused by brake fluid leaking into the servo unit and then sucked into the inlet manifold. Have a compression test done - this will clarify your problem. Trust you are also using a high grade quality petrol. Loss of coolant and over heating will indicat head gasket problems.
White smoke can also be caused by ATF or oil that has vaporized but not burnt much or any. You can have a leaking head gasket and still have good compression. It has to go one way or the other or leaking from one side or the other, coolant or compression, or both.
I think we need to stick to the term smoke or maybe steam if its water. MIRB may be right technically but leave that for science. If its visible people call it smoke or steam. If not they call it vapor or fumes. The stuff in little "Smoke" bombs is actually a vapor also (that is condensing) and everyone calls it smoke.
 
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