Some time the engine works unstably on idle speed. Rpm value is floating from 8000 to 7950-8030 rpm.
Dealer check and suggest to change ignitions plugs and direct injection nozzles. I agree with him, but after repair effect not disappear.
Surely the figures intended should refer to a steady idle at 800 RPM (an extra zero seems to have crept into your figures)
Which would make your lower figure as 795 rpm & the upper 803 rpm this seems a pretty close value to the recomended 800 rpm. How have you been able to measure the revs so accurately ?
Even if the upper limit were 830rpm you are still fairly close to the optimum value. ie -5 & + 30rpm
I wish half the cars I had in the past idled that accurately. Though I suppose with computer controlled ignition systems (which I assume the B class has) it should be accurate.
Members with diesel's have complained in previous posts about rough or harsh engines with considerable vibration on the pedals. I don't remember if petrol ones have given these problems.
As a matter of interest what part of the world are you from ?
I don't know if there is related to your "engine problem". I have noticed on mine when I turn on the ignition, shift to D, release the hand brake, and drive immediately. Even when I step on the gas pedal lightly, it goes up to over 3000rpm. After a few seconds or so, it drops down to "normal". Looks like the engine needs to "run in" for a few seconds. Is this normal? It is an auto transmission.
I don't know if there is related to your "engine problem". I have noticed on mine when I turn on the ignition, shift to D, release the hand brake, and drive immediately. Even when I step on the gas pedal lightly, it goes up to over 3000rpm. After a few seconds or so, it drops down to "normal". Looks like the engine needs to "run in" for a few seconds. Is this normal? It is an auto transmission.
heyy... i have notice that tooo... when i turn on the ignition...the Rev is about a bit over 1000, then after around 5-10 sec it'll go back to to normal which is around 800....
I have a question related to engine abot my manual B180 Diesel.
After I start and the engine starts to heat up, about when the indicator of water temperature reaches the first gradation (the single gradation between 40 and 80), I notice some lack of power of engine. In 1, 2, or 3 gears,when the RPM reaches 1800, until 2200-2300RPM, the engine is acting like "pulling back", like it has no power or some injectors are having dirt and the fuel has no place where to pass on.
After the engine heats up over 80 Celsius, this problem dissapears and the engine runs normally.
Could it be caused by the lack of Diesel quality? We have here all kind of gas stations, some of them less reliable.
So is the normal or not? kdbcom, any comment? Notice this on your current B?
Mine is a diesel so obviously would not expect ignition problems & I don't seem to have had the vibration problems that other members with diesels have had.
My only shuddering problem was at about 2000 rpm which felt like a "misfire" & was cured by some part of the auto box being changed (control unit ??)
Hope I don't have any of these in store for me on the new one
I asked the question about the revs "cycling" up and down as I had a Ford Fiesta (strangely enough that also had CVT transmission) that gave a similar problem & I seem to remember that they had to change a variable resistor (on the carberuttor) that was linked to the accellerator cable somehow. Unfortunately it was some years ago & the memory is getting a bit hazy now.
I have a question related to engine abot my manual B180 Diesel.
After I start and the engine starts to heat up, about when the indicator of water temperature reaches the first gradation (the single gradation between 40 and 80), I notice some lack of power of engine. In 1, 2, or 3 gears,when the RPM reaches 1800, until 2200-2300RPM, the engine is acting like "pulling back", like it has no power or some injectors are having dirt and the fuel has no place where to pass on.
After the engine heats up over 80 Celsius, this problem dissapears and the engine runs normally.
Could it be caused by the lack of Diesel quality? We have here all kind of gas stations, some of them less reliable.
exactly the same happens with my car
it is becoming more and more irritating particularly that with time this pulling is more and more perceptible, especially in winter
reported that some time ago but of course MB service havent found anything
heyy... i have notice that tooo... when i turn on the ignition...the Rev is about a bit over 1000, then after around 5-10 sec it'll go back to to normal which is around 800....
Mine's the same, I thought it needed the high idle to warm up, but it has done it to me when it's 28C outside. So who know? That wouldn't be to spool up the turbo a bit?
exactly the same happens with my car
it is becoming more and more irritating particularly that with time this pulling is more and more perceptible, especially in winter
reported that some time ago but of course MB service havent found anything
So I am not the only with this problem....
I tried more Diesel types from the most reliable stations here: OMV and MOL.
I don't know about there, but here we have two types of Diesel fuel: Euro 4 and Euro 5. Euro 4 costs 1.01 EUR/liter and Euro 5 costs about 1.1 EUR/liter. I heard that Euro 5 has more benefic aditives and it is provided from Austria or I don't know while Euro 4 has more sulf concentration and it is a bit lower as quality.
Anyway, I noticed that with Euro 5 type the engine is running almost normal without this problem. Or, maybe it's just a placebo and our engines are having some problems.
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