What on earth’s in our car park now?

Having slavishly battled today's rain, this lithesome little rascal just entered Top Gear's top-secret underground car park, located just off Wood Lane, London. And, such was our frothing excitement, we wanted to share it with you.

But we're horrible. So instead of full-frontal images of this glorious machine we're giving you this ambiguous picture and the following three tasks:

1. Look at said picture
2. Guess what car it is
3. Post said guess in the box below

There's not a single prize on offer, other than the knowledge that you know more than you ought to about cars. Which is tantamount to a prize in itself. But definitely isn't one.

Now go. Walk out the door. Just turn around now. And guess the car on our basement floor.

Update 1: It looks like we've succeeded in making it hard. Here's another pic. 

Update 2: You're getting closer but are still not there. 

Update 3: Well done Johnnk440! It's the new SLK 55 AMG.