Again, this sounds like the "intermediate lever issue" (hopefully you have googled or searched for the past many threads about this issue so that you can understand what may be happening).

If this is the issue...you can either throw money at trying to fix it...or get used to it being an idiosyncrasy of the N62 engine (usually happens in cooler temps)...and get yourself an OBD II reader/scanner (or use the software/hardware you have) so that you can clear the OBD II codes that get set when the levers get out of sync (which is going to cause the misfires & set the fault codes)...and learn how to quickly turn the engine off when you detect the misfiring (the lumpy idle etc)...then wait a few seconds then try a restart to see if the levers get back into sync.

If the SES/CEL warning light comes on from the scenario above, then pull the codes (will probably be misfires etc) and clear them with your reader/scanner. In 99% of cases...the codes do not come back if they came from the out of sync levers...which are now back in sync.

Some have even suggested to press the gas pedal down slightly on very cold days and keep the RPM above 1000 for a few seconds to insure against valves sticking (which gets the levers out of sync).

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