Mercedes-Benz Cars & Trucks - Page 6 - Recent Questions, Troubleshooting & Support

My air intake hose is popping off near the throttle body and code p1234 comes up

P0794 (not Po794) is a code that indicates an erratic speed sensor (sensor "A") input from the transmission shaft. This can mean the transmission is slipping or the sensor is defective, testing will tell the difference. It has nothing to do with the engine. P0793 (not Po0793) is the same basic fault code as P0794, a erratic output from the shaft speed sensor "A". P0093 (not po0093) Fuel System Large Leak Detected, this means the fuel tank doesn't hold pressure. There are many reasons for this condition, it takes special testing to determine the actual cause

Unfortunately, these Mercedes codes are not available anywhere on the Net for free. However, you can get these codes from the serial number here. I have always found them cheap and reliable.

They will email the code right back to you on the same day and I can vouch for them as I use this site for units I repair that occassionally need a code.

Hope it helps. Thanks for using FixYa.

Question edited to add maker. Question moved to make model category albeit wrong year. NOT TRUE. Larry Ng gave you a very comprehensive answer with diagram as he always does. He is actually our Computer Guru but is multifunctional and good with lots of subjects and like me can find stuff. Here is the post with the answer. Irrespective of differences, belts follow a theme for routing. https://www.fixya.com/cars/t29886100-1999_c280_serpentine_belt_diagram ..

hi ,try here....scroll down the page https://www.truck-manuals.net/mercedes-benz/

USA store (oh-really)? lol 2.8Liter sure. (not all engine same world wide, I state USA only. learn that there is not just one belt on cars. some have no AC, (like in Alaska?) the box drawing my be generic why look at that, and not the servicemanual I run Gates belts. and there ecatalog shows all variants on said bet. did you know 1 year even 1999 can have mid year changes. that happens July1 of each year, of they do. at model makers year change out in the factory. serp belt is accessory belt drive. true named. c280 Air Conditioning, Alternator, Power Steering and Water Pump? and crank pulley and idlers and tensioners. does this look good https://www.rockauto.com/en/moreinfo.php?pk=4314&cc=1356296&pt=8900&jsn=865&_nck=Ekt6BqBF1pwlXdx0gYlm1XyS%2BrEifIwvxWIl7Mt9zft%2BWrd9NkObID6vX0VSfQvQu4KjTdKrzbDUBi9MzX%2FMdafUFWZ%2BkPLPhA3p459yzN5jahF9CkWK61AE1gwRyc1NGanc42NoGFtjioNnLEFqL4Nvq56Tl5%2FmGnjf4LAiVXihsqzOLhZMiK0TVW%2BQ%2FxBaS43F2q1Lp7u79oc%2FRn0hTXM15Z8mmf617e6uatSLGpIEtfKvyTNtYjnlpJ9LiSFDCTNEnEvaw%2FBr8PstYUHB1hSiAzQ9GZ%2BQT8iutHZLpxRKkgPpvw3zHnBz8AQK5d%2FKdS4rsfmggf9vrJFs9gAG%2F%2FxEGVKTqZvr%2BR5kxZ%2FCAxk3d5AC8wk%2FGSz3HofJGuSSv4KrlsaFwKtXMva84Gjgiw%3D%3D i will now do service mAN page. some folks have the AC compressor clutch bearing go bad and decide to run the shorter belt and they sell them, no AC.

Most of the time the cd changer will need to be replaced. Your only chance is to do a power reset to the cd changer. pull the fuse for 15 seconds, re-insert and see if the changer reboots correctly. The fuse chart is behind the triangular panel on the left side of the drivers side dash panel

Map sensor problems are more common on certain models. As far as engine computer sensor reliability this is one of the sensors that appear to be more reliable overall. But on a few models poor mounting location chosen by the factory may reduce its reliability.You can use BMW scanner to check the problem

Check for power with a test light(not a dvom) at the tail lamp assembly. Test right at the spot where the bulb socket sits. If you have power then i would check the connection tab on the bulb socket itself for pits or corroded tabs. If you do not have power present at test point then double check the fuse chart and see if it says 'electronic' instead of having a fuse amp rating for the tail lamps. If it says electronic for any of the light circuits then it means their is no external fuse that can be replaced and the problem is most likely internal of the headlight switch. Since the headlight switch is actually a power source for the lights. I would start there at this point. Let me know what you find and if you need anything else just let me know

Make sure you have good batteries in your key fob. Also, there is a trunk, lock, and unlock relay. If anyone of those are bad you can have this problem.

You will need the dealer to scan the system for faults, no other solution.

They are reliable if well maintained

Most cars and trucks can be re-set by disconnecting the negative batery cable for about 10 minutes...this should auto re-set to factory specs...if the light comes back on, you have wired into the wrong system. Hope this helps.

There should be a fuse chart in the trunk of the vehicle where the tools are. Lift up the carpet in the trunk to expose the tools. It should be all folded up and stuffed in with the tool to remove the lug bolts. The chart will show the fuse and fuse box locations.

Question edited for clarity. Question moved from Misc to Mercedes. It appears to be a known issue. https://www.google.com/search?q=Mercedes+Axor+overheating ..

So your taillights should have 2 bulbs in them. 1 that turns on when you turn your lights on and stays on until you turn them off. That same bulb should have a 2nd circuit that lights up when you press on your brakes. The 2nd bulb appears when your reverse gear is engaged. So if you have no lights on right you have to replace both bulbs and if you have no brake light on the left you just have to replace your rear brake light bulb.

All of those are controlled by the Body Control Module. You have a communication System failure on the computer network that joins then all together. You need and auto electrician with a pro grade scan tool computer to diagnose where the issue is an fix it. https://www.google.com/search?q=auto+electrician+near+me ..

Question edited for clarity, full maker name. Question moved to category, albeit '2005'. Yes, it the battery goes flat, or is disconnected, the anti-theft and alarm needs to be reset. https://www.google.com/search?q=2003+sl500+reset+security+system ..

You need a mobile auto electrician with a pro grade scan tool computer.

Question edited for clarity See the videos https://www.google.com/search?q=2004+Mercedes+Benz+C320.+open+the+hood+to+replace+a+broken+hood+release+cable ..