Have a 05 E65 charging at 18.5 volts, shuts down the whole vehicle. Check th battery - it was cooked,replaced it - Alt. still charging at 18.5 volts, Desired voltage is 14.5 according to the scanner.
Im assuming desired voltage is what the DME is requesting the Alternator to put out.
Just wondering how common Alternator failure is on these vehicles?
Car is fixed - Installed new battery,alternator, and regestered battery and did a manual reboot before connecting battery while I was replacing Alternator.
Charging like its supposed to.
Had to see info on battery and alternator through power supply and Dme was requesting Alt.to charge at 14.5 volts but there was an internal problem with alternator that caused it to charge over 18 volts.
Now I have a new problem - I see coolant coming out of the weep hole on water pump - I know its not the water pump thats leaking.
There's a common problem on the N62 motors. The coolant pipe that runs across the engine under the intake manifold (see attachment). The $2 O-ring leaks. The job is a big one, bills out at something like 16 hours. Some guys are carefully pulling the front timing chain cover and doing it that way, but tricky to do right. There is someone talking about making a two-peice expandable tube to do the job from above. Not sure if it's on the market yet though. Good luck.