Just changed the fuel filter on my 98 e300 td, just about ran the battery dead trying to start the car. Charged the battery at 10 amp hr for 2 hours and finnaly started but got the check engine electronics and check engine light that won't go away. The car was running fine before and appears to be running fine now even though I have not driven it.
Would appreciate some advice on this problem, can I go to auto zone and get this code reset or is there something else that bit the dust?

thanks
acerejo