95 s320 battery died and car will not start with new battery
 

I bought this really nice 95 s320 and the previous owner said it would not start sometimes. Super clean car. I would turn the key and dash lights up but no cranking. I messed with the locks for about a hour and got it to start. It started everytime for 2 weeks and then battery died. I replaced battery and it has dash light and will not crank. I replaced the neutral safety switch on the trans. Checked all fuzes , I even replayed the relay in the glove box. I need help! The drivers door lock had a leak and I fixed that .What do I do next?? Do I need to replace my key or by pass the immobilizer . I need this to run or need it gone! Thanks for any help!