Fuel smell in cabin

[peebee]

Hi all . Just wondered if anyone could give me an idea of cost to have the high pressure fuel line replaced. I bought my 2015 w205 2.0 petrol a month or so ago and have noticed when cold the cabin smells of petrol that goes away after about 10mins .
On reading posts on here I am assuming it's most likely to be the fuel line but was hoping to get an idea of cost before I take her in so close to Christmas. Based in Romford Essex if any one has any recommendations. Thanks in advance.

 

[sonic]

Was it a dealer sale, take it back on warranty.
If you can smell petrol it should be easy enough to find, as for cost I have no idea.

 

[mioba]

Don't assume its the fuel line. Check.
Look in the engine bay, follow the fuel lines with your hand / fingers and look at them for wet parches smell.

If it is the fuel line, depends which one (parts cost), where it is (accessibility - labour cost).