hello i hope someone can help me i have a 2000 merc 220 auto.i had a company car and wasnt usin the merc tho i was taken it out for a run every few days and it was totally fine tho i changed jobs and the company car had to go back and the merc wouldnt start.i have tryd it in park and netrual and it wont turn over at all.the bat was flat and was changed and all electrics seem to work fine tho it just wont start.i have checkd,fuses and the gearbox sensor,someone said that as the bat went flat it could be the immobiliser has kickd in and the key could need reset with the imob i thought this was a long shot tho i dnt know..anyone who can help with any advice it would be greatfully appriecated in advance

Hi,
exactly what happens when you put they key in and turn?
Any clicking?
any engine noise at all?
listen carefully!