Ensure that your battery is working properly. Key won’t turn the ignition/ Driver Authorization System. The most likely scenario if your key won’t turn is that the battery is fully or partially discharged as it won’t allow the electronic ignition system (EIS) to function properly. If you experience any of these issues, replace the sensor as it is quite inexpensive. You would know if you have a failed crankshaft position sensor if: If you don’t, then the issue is on your fuel pump.Įnsure that the fuel filter is also replaced as old ones tend to get clogged up.Ĭheck engine fault codes. Check the code that your Mercedez Benz will display using an OBD1 or OBD2 scanner, depending on the model of your Mercedes Benz. You should hear the fuel pump run every time someone turns the key in your ignition to position 2. Once connected, start your engine and make sure you get around 60 psi that way even if you turn off the engine, the pressure is steady.Īlso, check the status of your fuel pump and the fuel pump relays. You have to turn off the engine and connect the gauge to the Schrader valve test port. Gear Selector Module. If you don’t see the gear indicator on the instrument cluster change from letters P to R to N when you move the shifter from Park to Reverse to Neutral, then it’s more likely that the gear selector module is defective.įuel issues. To check, make sure you have a fuel pressure gauge that has a Schrader valve adapter. Make sure that you replace it with the same ampere fuse like the original one after testing the fuse using a digital multimeter.īrake Light Switch. If your Mercedes Benz Drive Authorization System won’t allow you to start your vehicle, it’s more likely that your brake light switch is not working. Remember that is a particular vehicle system malfunctions, it’s the fuse which takes all the brunt and is burned out. If you have a relatively new battery, though, but the engine won’t start, trickle charge your battery by using a 12-volt trickle charger.įuse and relays. The fuse on your starter circuit, Ignition, EIS, or Fuel Pump should be checked next if the battery is not the issue. Most vehicle owners would replace the battery only after ten years of use, but the replacement should be considered as early as 6 to 7 years.
The most obvious reason is that the battery might already be too old. Reasons why your Mercedes Benz won’t start:īattery. you put the key in the ignition, but it won’t start.your car turns over, but it won’t start.you hear a clicking noise, but it won’t start.You would know that your Mercedes won’t start if: it’s Drive Authorization System should start.it should have electrical power to crank the engine.However, before you attempt to fix the issue yourself, a few conditions need to be met first such as: If your Mercedes Benz doesn’t start, you can perform a few troubleshooting to avoid Mercedez Benz repair Laguna Niguel costs.
0 kommentar(er)
