I saw smoke from bonnet and dont know what went wrong.

[wizz]

When coming to office i saw smoke from bonnet.

Not too much though.

Please advise

[swapan]

Check for some coolant / water leak in engine bay that might be falling on heat shield and producing smoke.

Check for brake oil leak, if its leaking on manifold it will produce smoke and if leak is bigger it might catch fire.

[bmwdoc]

drive it to the nearest garage and have them check the oil and water levels before its too late and you cook the engine