Welcome MB Forum, this is a weird one so any help would be appreciated. 2010 e550 with 52k on it, ran and drove perfect. i had the car parked for a couple days and went to start it but the battery was dead. I used some cheap Jumper Cables to the jump terminals in the engine compartment but didnt get it going. I then ran a battery charger to the trunk battery to charge the battery and it's still not even cranking over. All my lights inside and out are working fine so i'm thinking a fuse or relay is bad. I checked all my fuses both in the engine and trunk and can't seem to find anything wrong. All i get when i try to start is dead silence!! any help or suggestions as to what is going on or what happened??

 

Can you take it somewhere to have the battery and starter tested?

If the battery is fine and the engine won't crank over then the problem points to your starter.