Help with gearbox and A/C problem

[calypso]

Hello,

I am new to SL ownership. I am very pleased with my purchase an American spec SL380 but I have a couple of problems to sort out.

First the gearbox does not shift as it should. Sometimes it starts in third or fourth (I know they start in second normally), othertimes it just does not kick down when it should, or it takes ages to kick down. It does however change down if I move the lever back to S or if I press the pedal enough to engage the kickdown switch. It will also do quite rough changes if accelerating, changing with a jolt. All this happens sometimes but other times it works just fine.

The second problem is with the ventilation system. In any position (including A/C on) it pours hot air out of the vents.

The last thing is an oil leak from underneath, any common places to start looking?

Any ideas guys?