Q: why wont my ml350 start

asked by on January 22, 2018

i bought at auction 1 month ago, havent been able to start yet. i was getting no fuel at rail , so i changed fuel pump and fuel filter now i have 55 psi at rail. spark plugs seem to have no odor of any fuel. also when i put my key into ignition and turn it it gets locked in the ignition. i have to get it out by depressin g the shift lock mechanism inside of the shift column. so a mechanic pulled that mechanism out so i could get to the button easier to release the key. does this button have to be in place in order to start vehicle? note key is recognized per mercedes mechanic. also my brake lights not working. This year model did away with the brake light switch under the brake pedal so i dont know where the new location is. also changed brake fluid pressure sensor. does the fuel preessure sensor tell injectors to operate?

My car has 260000 miles.
My car has an automatic transmission.

You should have the computer scanned to see if there is codes for cam or crank sensors and if they are sending signal to computer so it will open the injectors. Also check injectors for pulse by the computer. If no pulse then you may have a defective cam or crank sensor.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

I hear a clicking sound when I turn left.

It sounds like you may have a bad cv joint. I would recommend having a YourMechanic technician come out and diagnose the clicking noise and they can install a new cv joint one as well if that is in fact...

P0015 code

A P0015 doesn't refer to the Oxygen (exhaust) sensor. But if you want to change it, Bank 1 on the Mercedes V6 is the left (driver's) side of the car. P0015 indicates the camshaft on bank 1 is over-retarded. This...

transmission axle has play or movement.

Hi there. The axle play could be caused by the outer bearing on the transmission to be worn out. The bearing is inside the transmission, so to replace the bearing, the transmission will have to be removed from the vehicle...

My car doesn't move when in Drive or Reverse when idling

If you pushed the pistons into the calipers in order to accommodate the new pads, you may now have too much brake fluid in the reservoir. Check that the fluid level in the reservoir is not above the maximum level....

Code P0700 and P0722

Hi There, Code P0700 relates to the ECU detecting that there is a malfunction in the transmission control system, which then triggers a fail safe mode. Once this happens, this code will remain until the problem is corrected. In your...

Maintenance light - 2003 Honda Pilot

Hi there. There are numerous reasons this could be happening. The most likely reason a light may come on is that it is due for oil change. If you can, check your mileage since your last oil change and determine...

Coolant light is on

The coolant temperature sensor may have a malfunction or your engine computer needs to be reprogrammed. The problem may occur when going through temperature extremes. The computer can sometimes read a rapid change of temperature which will turn on the...

2001 Chevy Silverado changed transmission fluid and filter now it will shift but won't move even in neutral

Hey Jack. Thanks for contacting us today. It's quite possible that the root issue is something very simple, like a shift solenoid not correctly attached or installed. It's also possible if the fluid was flushed, that a few inner seals...

Car Vibrating and bottoming out

The basic condition of the engine can be verified through a cylinder compression test. If the compression in each cylinder is within factory spec., there is not too much variance across cylinders, and you are not using more than a...

Related articles

A Buyer’s Guide to the 2012 Mercedes-Benz R-Class
This This non-minivan, non-SUV, non-station wagon is nothing if not a class unto itself. Mercedes classifies it as a crossover but it reps more like a combination of all of the above. Its precise identity is really immaterial however, as...
A Buyer’s Guide to the 2012 Mercedes Benz S400 Hybrid
When When you expect your vehicle to show everyone that you have truly arrived, while being greener than some of the other luxury options, the 2012 Mercedes Benz S400 Hybrid needs to be on your list. Add in the fact...
A Buyer’s Guide to the 2012 Mercedes-Benz SL-Class
Nothing Nothing says true sport luxury like a Mercedes hardtop convertible, and the SL more than delivers on the name’s promises. While both the SL and its sibling, the SLK, offer superior luxury, handling, and comfort, the SL boasts the...