my e70 diesel has been in for nearly 2 weeks, originally because battery issues were causing other faults, oil level being one of the issues. They replaced the battery and the oil sensor, went through a couple software tests, and are now checking wiring harnesses for shorts. They are about to do their next puma (did one already on this but no luck) so now I guess I should expect a new DDE if we are both having the same problem. Will let you know tomorrow. BTW, what happened with yours? Problem solved?