Plz I m having high fuel consumption problem,I have checked the air filter,changed spark plugs,there a gas smell from time to time,as if there is a problem in combustion,KM 80,000 till now
The motor is in good condition,plz anyone can help me!
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check for codes and data readings. check O2 sensor readings, is the thermostat tired and not working properly, this can cause high fuel consumption. take a close look at who and how the car is being driven.
sounds like clogged fuel filter, Replace filter but before you do run a bottle of STP gas treatment or injector cleaner. The fuel treatment is dual purpose, it'll also clear out any water/moisture in fuel system. This time of year with big swings in temperatures, condensation forms in fuel tanks and that could be an issue w/your Benz
Last month, my wife complained of high gas usage as well. I suddenly remembered that I had forgotten to change the air filter the last time I did the oil change. It had been over 5 months since I'd put a new one in. So, we got a new air filter, and monitored the usage, and it was back to normal again. Maybe try this?
You can over-inflate your tires by about 8%, use a K&N air filter, drive 15 kph slower on the highway, accelerate slowly and never accelerate uphill, draft behind larger vehicles, regular maintenance (oil changes, spark plugs, wires, filters), use a fuel system cleaner every oil change. These can increase your fuel economy drastically, but if you are still noticing poor fuel economy you should have the car checked by a mechanic for what might be causing the high fuel consumption.
ya its running very rich that why it makes that black smoke,this carbon is made because the sparks plugs does not make a good and sufficient spark,so i advice u to change the 4 spark plugs,also renew the air filter
transmission slipping dragging brakes.timing off worn timing belt .bad spark plugs + wires +coil.defected valves and worn cam shaft.use scanner to check oxygen sensor. run engine 5 minutes look at scanner . should read closed loop . if read open loop replace oxygen sensor.