And don't forget, this was all done in a car - either the OP has a very big car with lots of room (and probably a bed as well), or this "review" is a piss take...
Can't make up my mind on this... 
You've got to experience exhilarating, seriously steamy car sex as the urgency of wanting to rip off your partner's clothes in the throes of such intense passion,all that increased excitement and adrenaline mixed with the thrill that someone might be watching is hot.Plus,you can do it anywhere your sexcarpades take you!
I will bestow some tips I have learnt
Here are the 10 Carmandments:
1: Park in an isolated safe area
2: Wear comfortable, easy to remove clothing that you can use as pillows or to prop your head against. Angel has lost count the amount of times she has banged her head on the car doors. You need to be able to put said outfit on in a jiffy incase of sudden visitors.
3: Make sure handbrake is on for obvious reasons.You don't want to end up rolling down a hill or falling into a ditch
4:Move front seats as forward as possible
5:Plenty of space on the back seats for various sexual positions such as missionary ( which is the easiest) doggy and cargirl.But, reverse cargirl can be done in the passenger seat as the glove compartment is great for leaning and leverage.
6:Don't ever have sex on the driver's seat since there is a likelihood of hitting the horn and you might not have a tiny hoot.So,this will draw attention to yourselves.
7: Be mindful of various body parts as you move around.Angel has cut her fingers and bruised her legs on multiple occasions.
8: Keep your moans and groans of pleasure to a neighbourly level.Yeah,right!
9: Steamy windows in the dark work as wonderful mirrors. I know Angel pointed this out one night and ever since then she loves looking through the mirrored windows watching my cock going inside her.
10:A good workout can build up an appetite so to be sure to take some supplies with you. We recommend something simple like a couple of Ginsters pasties.They take the edge off without leaving you too full to continue your fun and frolics.
Please bare in mind this is when the engine is stationary.
For blowjobs/ road head in motion there are 10 different Carmandments:
1: Keep in a lower gear.I recommend 3rd,unless on a motorway then 5th is fine.Try to avoid gear changes as much as possible.Angel finds all the constant gear changes and stopping and starting annoys her rhythm.
2: Seriously keep your eyes on the fucking road no matter how tempting.
3:We don't recommend bumpy country roads or main roads with lots of roundabouts and junctions,unless of course, like myself you like a challenging drive.Better off sticking to motorways,a nice straight smooth ride.
4: If you don't already,learn to drive with the seat right back do I really need to explain why?
5: Keep an eye out for the Police as they love to catch people doing naughty things.
6: It's a good idea to let your partner know what's happening too,whether you have a tight corner or a speed bump coming up,you don't want her to accidentally choke.
7: Important this one: HAVE FUN, seriously enjoy yourself.Its daring,thrilling,naughty and adventurous; embrace it.Obviously just be careful not to crash or you'll have a job explaining that to the insurance company.
8: Think about investing in a small cushion to rest on the handbrake.Angel has pointed out to me that it squashes her boobs.
9: Learn the art of nonchalance,if you look like your doing nothing out of the ordinary people tend to take less notice of you.Although,we did get spotted by a guy on the Cooks roundabout off the A406 not long ago.If it was one of you guys.... Hello :-)
10: If you have cruise control then your halfway there already,well done!