Sometime smell oil in 750 li when heat is on - 2006 BMW 750Li

dealer time

more likely gas is leaking from the gas tank not oil. maybe you blew a rear shock instead?

If it is like earlier models, open trunk, move rug away from back edge, turn socket to unplug and access bulb.

Oil presser release valve mite be us

You don't mention what that smell is reminiscent of?

You don't mention the colour of the "smoke" and you didn't say whether the engine is petrol or diesel?

You don't mention whether the road behaviour/performance is normal?

White smoke is almost always steam or in the case of a diesel it could be an unburned fuel mist, grey/black is excess fuel and blue or grey/blue is burning oil.

Some steam is fairly normal until the engine and exhaust system is hot but excessive amounts could be one symptom of head gasket trouble. If the engine is drinking coolant and sending it through the exhaust as steam it will sometimes smell spicy.

Burning oil smells a bit like burned eggs in the frying pan.

If the car hasn't ultra-low sulphur oil and fuel the catalytic converter will convert sulphur traces into hydrogen sulphide - the bad egg gas...

Some smell is normal if it has been quite sometime between oil changes. This happens more with short distance driving.

How does it get there?

Through cylinder blow by when the engine is cold. The piston rings leak minuscule amounts into the oil which add up over time.

If you are having no other running issues (IE black/drk grey smoke out tail pipe with oil residue on pipe tip) I would not be alarmed by this.

When parking your vehicle, try to put piece of white paper on cardboard paper to se if there is any leak.
Sometimes oil can drip on your exhaust and trigger the smell thru your A/C Heat duct.

It could be the purge valve not working. I'm not sure where yours is but with my Ozzy Ford it is hiding inside the passenger side front guard near the charcoal canister. I used to smell fuel often but not since I replaced the solenoid valve. Check that it is buggered before you buy a new one, they're usually expensive.

press the satrt button with foor off the brake until lights turn on,close the doors and press and hold the trip button on the inst cluster,abs will come up and then go,than you will see all the diff cbs requirements on left side press button until the brakes come up and press and hold again, it should reset to ???tkm