Just got a 42000 mile E320CDI 2005. Runs and drives great. The biggest issue seems to be the saddle tanks ran out of fuel at 3/8 of a tank seller said it happened once to another E320CDI he owned just filled it up and never had problem again!!! Not sure I should have the dealer fix the tank issue or look into myself What temp should it run at mine is 60 to 70? Have a manual on order and may get thermostat. Thanks