My 1999 e320 150k single owner just stopped would not start during my errand trip. Local mechanic said to replace starter, it didn't solve the problem , he said he can't figure out a problem. Then a Benz former mechanic looked at it n said it's k40 relay . We replaced it, didn't work , then he ask me to order new key, didn't work, car turns to 2 all lights are on it does a 2 sec attempt to start but that's about it, replaced new battery it's been 3 months . N no body can figure it out. Finally towing to dealership. Hoping to find a solution. Any help is really appreciated. Thanks in advance