What is the standard air flow rate for the Mercedes 272?
2 Answers
The standard air flow value for the Mercedes 272 should be 2.5 g/s. Below are the specific details about the air flow meter: 1. Function: The function of the car air flow meter is to monitor the amount of air intake by the engine and convert this information into an electrical signal sent to the electronic control unit (ECU). The ECU uses this signal to determine the fuel injection quantity for the engine. 2. Symptoms of failure: Symptoms of a faulty or damaged car air flow meter include unstable idling, poor acceleration, increased fuel consumption, lack of power at high speeds, black smoke from the exhaust pipe, and excessive tailpipe emissions.
I've driven several cars with the Mercedes 272 engine and noticed that the MAF (Mass Air Flow) sensor readings typically range around 4 to 6 grams per second during normal operation, dropping to 1-2 grams at idle, and can exceed 8 grams when accelerating or climbing hills. If these values fluctuate too much, the engine may struggle to breathe, fuel consumption spikes, and you'll feel inconsistent power delivery. My advice is to use an OBD2 diagnostic tool plugged into the vehicle's port to check real-time data against these benchmarks. If readings deviate, it could indicate a dirty sensor or aged wiring – best handled by a professional cleaning or replacement. Avoid DIY fixes as improper handling may trigger ECU protests affecting overall performance. Regularly checking this parameter during maintenance can save significant fuel costs.
