ML320 hard to start - Looking for suggestions

[crystaldon]

Hi, I have a minor problem. Any advise would be greatly appreciated. My ML320 has been generally problem free. I rescently took it on a 400 mile trip. Half way through the trip I filled-up on gas. Later, I noticed that it was getting hard to start:

Normal was:
-Turn the key and it starts in 3-4 seconds.

Hard to start is:
-Turn the key and let it turn-over for about 8 seconds, doesn't start.
-Try again for another 8 seconds, doesn't start.
-Try again and it starts, runs rough for about 3-4 seconds, then works fine.

After running for a while (10 miles or so):
- Shut off engine and restart within 1 minute, starts normally.
- Shut off engine and restart 10 minutes later, it's hard to start.


I've run 2-3 tanks of gas through it since the trip, but have'nt seen any improvement. Any suggestions (dry gas, fuel filter, other)? Thanks for the help,
Don

[josiebaby]

Check out the fuel filter, on the "original" ML's (pre-initial facelift) there is a fuel filter modification (costing about £300!!!). In theory this shouldn't make a difference but it's always worth checking it out.