Troubleshooting fuel-related problems are not very difficult, and you can check the fuel pressure yourself. Is the engine turning over? Let’s eliminate the possibility of fuel system problems. Step 4: Fuel Problems, Mercedes Won’t Start If you replaced the brake light switch and your car won’t start, move on to Step 4. Read DIY Article: How to replace the brake light switch on any Mercedes-Benz. The procedures are very similar for Mercedes-Benz models such as CLS, S, C, ML, and R-Class. In the video below, you will see how easy it is to replace the brake light switch on a Mercedes-Benz E-Class. You can buy a new brake light switch on Amazon for less than $15 and search for Mercedes-Benz Brake Light Switches. As you move the shifter from Park to Reverse to Neutral, do you see the gear indicator change on the instrument cluster? If you don’t see the letters on the cluster change from P to R to N, it is a good sign that the gear selector module is defective. This is because the brake light switch has two or more micro-switches inside, and only one controls the rear brake lights.Īnother way to verify if the gear selector module works properly is to examine the instrument cluster. Unfortunately, looking to see if the brake lights turn on while you press the brake pad is not a good test to tell if the brake light switch is working correctly. Gear shift stuck is one of the most common problems with Mercedes-Benz cars. Sometimes, you will notice this problem because you can’t get the car out of the park. The Drive Authorization System will not allow the vehicle to start if the brake light switch is not working correctly. The brake light switch is a common culprit and frequently fails on Mercedes-Benz cars. Step 3: Check Gear Selector / Brake Light Switch Read DIY Tutorial: How to check all fuses on a Mercedes-Benz, the easy way. We used Mastech AC/DC Digital Multimeter in the video tutorial below. To test the fuses, you can use any digital multimeter to easily and quickly check the fuses without removing them. There is a chance the fuse could blow again shortly after that. Make sure to replace the fuse with the same ampere rating fuse. Keep in mind that fuses are there to protect systems when they malfunction. If you are not sure, you can quickly check all the fuses to make sure none of them are burned out. There could be more circuits that impact the starting depending on the model. You would want to check fuses for systems such as Starter Circuit, Ignition, EIS, and Fuel Pump. Next, you should check the fuses on your car. Mercedes won’t start, and it’s not the battery. If you need help, read this article on How to charge a Mercedes-Benz correctly. In this case, you need to trickle charge your battery using any of these 12-volt battery trickle chargers. This Mercedes-Benz is not starting because of its low battery. You go to start your Mercedes-Benz, and you either hear it turn over once or hear several clicks, as in this video. You know you have a relatively new battery. You can c heck prices and read reviews for multiple Mercedes-Benz AGM Group 94 Batteries that will fit your Mercedes-Benz. They cost much less than the battery you purchase at the dealership. If you want to save on the price of the battery, head over to Amazon and check out these batteries that fit Mercedes-Benz. If you have an old battery, replace it before you move to the next troubleshooting step. While some MB owners have pushed over 10 years on an original battery, the battery should be considered for replacement around 6 or 7 years. How old is the battery on your Mercedes-Benz? This may seem obvious, but an old battery is the root of many headaches and can cause all sorts of malfunctions in Mercedes-Benz cars. Step 1: Verify that the battery is fully charged The vehicle makes a clicking noise but won’t start.
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