Ford mondeo won't start help me plz
 

Ford mondeo 2007 1.8tdci Estate car started first time yesterday after about a mile I noticed the full beam was on and airbag sign on the dash was on m6 so wen to Stoke like this went down slip road at Red lights turn of the ignition 2 see I'd it would nok it off anyway the car wouldn't start go tow truck 2 move me of roundabout he towed me n I got it going in first gear went strait home anyway recovery chap said take battery of for ten minutes n try again so done that this morning and nothing still the same lights work, horn works, radio works, interior lights the lot.. But wen put key in full beam just comes strait on only lights on dash is full beam and airbag.. But wen turn key nothing the lights go of wen try start it then bake on again help me plz as I no nothing about how to fix cars

The alternator could be fooked.

Is the Alternator belt still on the car?