After no usage for a couple months, the ML320 will not start.

With a charged battery, it starts and runs for about ten seconds and then dies from what appears to be fuel starvation. No warning light or codes retrieved.

I cleaned the air mass sensor with a special spray and still the same. I also added 5 gallons of fresh fuel, no positive results.

If I spray starting fuel down the air intake, it keeps running.

I would appreciate guidance on how to proceed.

Thanks