TD5 Starting Issue

I have had my TD5 5 years and up until last week it has always started absolutely on the button. A quick blip on the ignition and away it goes.

This week has been variable, sometimes it starts first time but others I have to hold the starter over for 3 or 4 seconds and in a worst case it took 3 attempts. It doesn't seem to make a difference whether the car is hot or cold.

I did drive through some water last week, not overly deep, probably 8 inches but that may just be a coincidence.

As a novice mechanic with a limited supply of tools are there any easy things I can check or is a visit to the local Landy garage the best option.

Thanks for any responses

Neil

could be a number of things but I would check that the fuel pump is priming (can you hear it pump with the igition on?) and get it on a diag machine to make sure the crank sensors not playing up

Check the battery,i had a similar problem with mine,would turn over for ages before starting got the battery tested at halfrauds and it wasnt holding a full charge,got a new one and hey presto starts on the button again

Gareth