Blown head gaskets are common. If you know how to fix this or know someone who can repair a blown head gasket quite cheaply will save you a lot of stress when owning an ED. Power mirrors, power windows and central locking components are prone to fail quite early on too.
Power steering leak
Loose drive belt
Split vacuum hoses
Inconsistent idle
Power window, power mirror and central locking issues
Blown headgasket
Warping front discs