ML320 wont start

When it won't start is there spark , does the check engine light come on when you turn the key on ? What's battery voltage at when it won't start , is the charging system working . When it won't start check power an grounds to the PCM/ECM - engine computer , your need a PCM/ECM connecter pin out .

not starter or alternator do you have any codes? if you have an electronic odometer ,put key in ignition and turn it on and off 3 times without starting engine, and stop with ignition in the on possion and you will get codes where millage is displayed ,at the end of codes it will say DONE

try replacing fuel filter , and next time you go to start it turn key on let it sit for count to 50 then start see what happens

not sure if any off this will help you o The starter won't crank. If nothing happens when you turn the ignition key to the "Start" position, it means that the starter motor doesn't turn over the engine. Most commonly this could be caused by a dead battery; here is How to check the battery. ... The ignition switch could be bad - it's a common problem.13 Aug 2013

Why a car won't start - troubleshooting tips - Samarins.com

www.samarins.com/diagnose/ut...or try this link. Car wont start Google Search

Sounds like you are having a problem with the starting motor. When activated, it throws out a gear to engage with the flywheel on the end of the engine. If there is not enough energy to fully engage the gear, or the gear does not engage properly due to misalignment, you may hear a grinding noise. Have the starting motor serviced or replaced.

Hello my MB ML320 wont start, only start if I jump it,i change battery but I have same problem it start if I drive for long time but if is park for more than 5 hours it wont start.

This car might not get enough exercise. By that I mean there are things that are running all the time, remote entry systems, clocks, alarm systems. You may have a new battery, but it needs to be kept up to snuff. Sitting alone in the garage with NOTHING running, the battery will lose about 1% per month in ideal circumstances. As I said, your battery is powering all kinds of things while sitting in the garage so the drain is more than the 1% I mentioned. You may want to consider a trickle charger on this car if you are not able to drive it for at least 20 miles or more per week every week.

It seems your average mileage is just under 150 per week. I'm guessing you don't drive this car much on short trips, rather the bulk of your miles were highway on trips.

If I missed the boat on this question, please add a comment and I will try again.

Thanks for your question at FixYa.com

Synchronization
Turn ignition switch to position II. Turn ignition switch to position 0 and remove key. Within 1 minute: Press and hold key lock button. Press unlock button 5 times. Remote control should now operate system. If not: Repeat procedure.
Programming
When
Key remote control added or replaced. System malfunction.
How
Keys can only be programmed using diagnostic equipment

check your starter motor

ok here you go
make sure the battery is fully charged befor starting
turn ignition to run
attempt to start once then release the key in the run position
let vehicle sit with the key on for ten minutes
the security light should turn off
turn igniton switch off
wait 5 seconds
turn key to run position
let vehicle sit for 10 minutes
turn key off
wait 5 seconds
turn key to run position
let vehicle sit for ten minutes
turn key off
wait more than 6 seconds
and start engine