...to change the spec of order once I have placed it with a dealer?

Placed the order at the end of Jan, but don't think it will be going into production until March for projected mid-April delivery because the options I chose (ProNav) are not yet available.

After reading a lot of posts here, I am succumbing to the idea of the Comfort Seats. Have I still got time to spend even more money ?

I'm in the UK if that makes any difference.

 

My dealer (in the US) asked me if I wanted to make any final changes to my order about 1 week prior to production.

I would highly recommend the comfort seats. I ordered them for the additional adjustable settings, the fold-out side head support, and the passenger + driver memory feature.

 

Considering your production time frame, you almost certainly can make changes. I thought about the comfort seats, but couldn't justify the extra expense. The regular or Sports seats are very comfortable "as is" and still offer quite a few adjustment choices.

 

I also added Lumbar support.

It's an option in the US.

I enjoyed that on my E39.

 

I ordered in early december for april delivery, car then appeared at the dealer 5 weeks ago built early jan instead of early march. I'd phone the dealer asap if you want to change anything.

In the uk comfort seats cost same as sport seats+lumbar, I've sat in mine and must say they are very nice, lots of buttons to play with and the way the side supports retract when you turn off the ignition is very cool.

 

OK, they're ordered. Better work extra hard now to pay for them!