Mercedes-benz w211 maf sensor replacement (2003-2009) e320 pelican parts diy maintenance article j gastrointest surg


A mass (air) flow sensor (MAF) is used to find out the mass of air entering a fuel-injected internal combustion engine. The air mass information is required for the DME to control and deliver the right amount of fuel to the engine. Air changes its density as it expands and contracts with temperature and pressure. In automotive applications, air density varies with the ambient temperature, altitude and the use of forced induction, which means that mass air flow sensors are more appropriate than volumetric flow sensors for determining the quantity of intake air in each cylinder.

The mass air flow sensor monitors air flow into the engine and creates a digital signal for the DME. Mass air flow sensors accuracy skews over time and can lead to fault codes or drivability problems. When replacing, inspect the plastic intake air ducts for cracks or dry rot. If the intake air ducts are faulty, replace them first and see if the problem you are having is remedied. An un-metered air leak downstream of the mass air flow sensor will set codes similar to a faulty mass air flow sensor. When you suspect a mass air flow sensor as the culprit for setting a fuel trim fault code, check when the fault code was set. You can do this using OBD II freeze frame data. Normally, a vacuum leak would set a fuel trim fault code at idle or very low engine RPMs. A mass air flow meter would usually set a fault code when you are driving, or a higher RPM. You can check your fault code freeze frame data using an OBD II scan tool, similar to how you would check for fault codes. In this tech article I will show you how to replace the mass air flow sensor on W211 models with a 6-cylinder.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Comments: Thanks for your efforts but the parts costs, photos, and instructions don’t match the car listed!! In researching the MAF sensor repair, I find this is a common problem. You do show the correct tubing with two sensors listed at $380, which is competitive, but you do not show components individually, which you actually sell. Suggestions in i structions are accurate… my problem was the seal on airtube to turbo connecte which you stock and I ordered. FYI

Comments: Hi;..good morning. ..I have left amessage on your mail box that I want to buy a Air mass sensor for my Mercedes E200….W211…dual fuel.Petrol &..Cng….Year of manufacture -2006…….Chasis number – WDB 2110422A970530…….Engine number is….27194130767047…..plese send me the link for me to make the order..Thanks waiting for your reply…..Regards..Balan

Comments: Looking to buy….air flow senser….for E200… mercedes….is dual…Petrol & Cng… ngt …its a 2006 model……WDB is…2110422A970530…..& …Engine number is….27194130767047……if you have this part pls email me….tnx regards…..Ben