Mercedes-Benz Answered Questions & Fixed Issues

Question edited for clarity. Question moved to model category. You need a local mobile auto electrician with a $5,000 pro grade scan tool computer. They can diagnose static issues but can also record exactly what happens to make the car shut off after 10 minutes and what happens 15 minutes later to make it start again. You can't guess issues like this on a car with so many computer modules and sensors. https://www.google.com/search?q=auto+electrician+near+me This says it might be the Crankshaft Position Sensor? https://www.google.com/search?q=2006+Mercedes+Benz+CLS500+cut+out+after+10+minutes ....

A little more information might help? What are the RPMs doing when the truck won't go past 40?

Question edited for FULL make and model. Question moved to correct category. With a multimeter set to volts. Full troubleshooting videos here https://www.google.com/search?q=mercedes-benz+e-class+air+compressor+troubleshooting ..

what's the year and model of your car? need that information to help you. leave details.

In this link https://www.google.com/search?q=2018+Mercedes+C300+firing+order ..

p0400 is dead EGR. and can fail 2 ways, stuck open or closed if open engine wants to stall and lots of other DTC errors caused by EGR, stuck closed, engine wants to PING I'd fix EGR first, and not go broke finding shirt tail failures. take it to shop let them fix it. some times just cleaning the egr is all that is needed. the other 2 codes are AFR lean codes and if EGR bad or worse after 20 years, they EGR cracks and sucks air and engine goes lean. I'd expect more things wrong and more DTC on any car this old. for sure driven ******* the Autobahn.

Starter motor on this car is imposible to get to..better find the post forward of the drivers side fuse box in the engine compartment where a bunch of wires come together. This is a positive terminal attach red jumper here put the negative jumper on any bare metal bracket of the engine

I suggest that you take it t a Mercedes dealer where they can simply reset the pressure monitor, probably at no cost since it's a simple operation.

May I offer a suggestion, if you are not a mechanic on transmission take it and get it repaired. The speed sensors are in the transmission, you will have to take the oil pan off then valve body but first drain the fluid then you will have a internal or input sensor then a output sensor [speed] if you are not familiar you could cost major cost of repairs hope this helps and Good Luck Mike L

Hi, Please double check that your car is in the "P" or "Park" mode before attempting to use the key again. Please remove the key and re-insert and attempt to start again 3 times. If you have a spare key, please use that key as well. If this doesn't work, please call 1 (800) 367-6372 to get further help with your issue. Thank you.

How do I get my Mercedes out of anti-theft mode? Look for a button that allows you to slide the physical key out of the fob. Step 2: Turn the vehicle key to unlock the car door without releasing it. Hold the key for 30 seconds in this position. This will signal to your car's system that you have the right key, and will enable you to bypass your car's alarm system. https://www.google.com/search?q=MERCEDES+BENZ+C+CLASS+reset+security ..

https://fuse-box.info/mercedes-benz/mercedes-benz-cl-class-s-class-c215-w220-1999-2006-fuses-and-relay All the models https://fuse-box.info/mercedes-benz

The maintenance service indicator notifies the driver when the next service is due. Approximately one month before the maintenance service is due, the type of maintenance is indicated in the speedometer display. If one large wrench is shown, a minor service (A) is due. Conversely, if two small wrenches are shown, a major service (B) is due. The value shown in the display may reflect the calculated distance (in miles) or time (in days) remaining. When the maintenance service term has been exceeded, this value is preceded by a "-" (minus symbol). You can read more about Mercedes-Benz maintenance service indicator lights here: https://www.yourmechanic.com/article/understanding-mercedes-benz-active-service-system-assyst-assyst-plus-assyst-fixed-intervals-maintenance-reminder-by-brent-minderler

1. buy the shop manual
2. or get car serviced, with MB shops that ever saw one.before.
3. look at it and say to self what needs to be pulled first, things easy, bingo now you did it all by your self ,just looking first
4. gets some quotes on this job , ask for the labor estimate and be in for shock. MB shoe horned cars. V8 huge and body small.(there)

look around maybe you have a pinched wire somewhere between motor and the transmission.

How to open my hood on the outside of my S320 2000

Mercedes-Benz SL 55 ,2005, I have 2010 MB Nag1 in my jeep.THAT IS CLASSIC TRANSMISSION FAILURE.only why remains, here is my 80year tranny fix page on car. fixesit is no pure HydramaticMy USA car, list of tests on any box. (generic)the A/T box (automatic transmission)from 1939 to now over 80 years now installed in GM cars first USA.They changed radially over that time. pure Hydramatic to....then in 1996 GM went from Hydramatic to 4l60E BOX. the E MEANS ELECTRONICALLY SHIFTED VIA TCM/TCU OR PCM BRAINS.for 2.5_ decades now we run E boxes and is so common GM removed the "E" today.but is the same box.there are only 2 paths here.(diagnosis) a new box or do all things that can be done on car.So I will now list all ON CAR things.(most)1: check all fuses. (after all power lost to the TCM would make it fail)2: check ATF level on the dip stick per the glove box guide, (hot engine/trans) in PARK, running and DIP checked)Do not overfill the box or doomed it is, or it foams up and STARVES bearings in the box, RTM always read the guide.3:Next up is the OBD2 scan tool (2008 and newer is best) and we connect to DLC 16pin port and scan for P07xx errors.4:GOT DTC errors, then look them up, they tell you speed sensors are bad, even 3 of them or 6 A/T solenoids are bad.Or DTC for gear selector errors (PRNDL, TRS or P/N switch fails) 5:Okay, most sensors and solenoids can be replaced on car, just pan off. (varies) some speed sensors are super easy to change.6:So far no JOY, well the Tranny service manual shows how to use a PSI GAUGE at the pump and pressure ports. in all gears and N/P7:learn too that the TCM can go to limphome mode, that skips gears, even all but 1 gear too.DTC will be set.never do'snever mix ATF brands and grades.never over-fill the box, start with 1/2 max (dry box volume) and work jump to full hot.If you drain a box all you get there is 1/2 the AFT other 1/2 is in the TC clutch. so measure what came out and put back the same in quarts or liters.or go to any oil changing shop find the shop with full flush tranny machined, and bingo done right. Mixing brands or old and new ATF is wackoon a new or rebuilt dry box , add 1 qt of ATF to the clutch TC drive collar first, and 1/2 normal to pan the work up.never start a transmission that is dry. (means start engine)Pre 1996 cars:On old pure Hydramatic failure on car fixes are:step2 and 6 above! checked.TV cable bad, stuck out (rusted) will case huge delayed shifts even stuck at 2nd gear moving fast. (throttle valve)Vacuum modulator seen on box. It change shift points based on engine (vacuum) load.if bad it can do the same wrong things as TV failures.Gear linkage failures, pure mechanical link fails.Can not shift out of park is Park/neutral failures, and all cars work different here, some have lever solenoid lock out.COMPLAINTS ( huge but here is short list common)only one gear works, (moving) or only Reverse is dead.skips a gear or 2. or up shifts too soon or late.down shifted gears shift wrong or late or too soon.FLARE, (aka. false neutrals in any gear)Stalls engine, TCC clutch hard fail and TC no longer slips engine stalls.or is weak engine, fuel pressure 1/2 normal.Transmission will not allow me moving fast to use the engine as a brake, (engine at idle moving fast)Gross transmission whine (see #2)Transmission totally dead. see all above.jargon related, (EFI means electronics fuel injection that PCM runs)DLC is OBD2 port Diagnostic Link connector,16pins USA. D shaped, pin 16 power must be 12vdc or tool fails.DTC is Diagnostic trouble code.PCM is the power train (all) module, engine and transmission end even TCM insideTCM is transmission brain first seen here 1996 usa. the merged into PCM on most car, late 90's

air ride system is leaking

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