Onward
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- Jun 22, 2013
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- Your Mercedes
- CLS350/2005/3.5 litre
Hi All
All help gratefully received on this......I have a 55 reg CLS350. It went for an Assyst Plus minor service and also due at the service were spark plugs and an oil and filter change for the 7 speed transmission.
Next day, there were engine issues (misfiring) and the spark plugs were changed (probably faulty batch) and this rectified that issue. Since the service, other than this obvious cured misfiring fault, I've noticed:
Everything we can think of has been checked, e.g. plugs again, transmission oil level, the diagnosis assistance reading shows all control units correct etc, etc.
Has anyone got an ideas to explain these issues? Two things concern me - anything going on that is putting stress on the car/engine and may lead to a more major failure or costly repairs, and also bringing the fuel consumption back to normal and obviously reducing the fuel cost by doing this.
Thanks in advance....
All help gratefully received on this......I have a 55 reg CLS350. It went for an Assyst Plus minor service and also due at the service were spark plugs and an oil and filter change for the 7 speed transmission.
Next day, there were engine issues (misfiring) and the spark plugs were changed (probably faulty batch) and this rectified that issue. Since the service, other than this obvious cured misfiring fault, I've noticed:
- at ignition the mpg indicator falls from 27.0 mpg straight down to between 19 or 20 mpg, where it used to fall to halfway between that. I do alot of motorway driving and where my consumption was normally 29 or 30 mpg at the end of a trip it now peaks at 26 or 27 mpg at best. I've not done the maths accurately but I'm doing about 40 miles less on a full tank and spending about £10-15 per week extra in fuel.
- at gear changes at higher speeds (60mph and above) the revs are higher and do not drop and I've had to take my foot off the gas sometimes for the gear to change and revs to drop for the cruising speed
Everything we can think of has been checked, e.g. plugs again, transmission oil level, the diagnosis assistance reading shows all control units correct etc, etc.
Has anyone got an ideas to explain these issues? Two things concern me - anything going on that is putting stress on the car/engine and may lead to a more major failure or costly repairs, and also bringing the fuel consumption back to normal and obviously reducing the fuel cost by doing this.
Thanks in advance....