[CarSeatKelly]

According to the database, when installed rear-facing the Marathon is a pretty poor fit in an Audi A4 - seats in front of it need to be moved up quite a bit to fit. This is not that shocking to me considering most of the Britax car seats (with the exception of the smaller Roundabout or Diplomat) are very tall seats and when reclined for rear-facing are quite lengthy/deep.

You may want to consider the new convertible car seat from 'the First Years' (formerly Compass) called the True Fit. It's got a much lower profile than Britax seats but is still a quality seat with generous padding for younger child comfort. It features a headrest that pops off easily for better rear-facing fit if needed and then with the headrest back on and installed forward-facing the harness can be used up to 65 lbs like the Britax Marathon. It's worth looking into, I think.

I hope that helps!

Kelly
Certified Child Passenger Safety Technician

	Forward Facing Car Seats A forward-facing car seat is one in which the child sits facing the front of the car. The seat should be installed in the back seat of your vehicle. Most forward-facing only seats are for children above 20 pounds.

	Rear Facing Car Seats A rear-facing seat is one in which the infant faces the back of the car. Always install a rear-facing seat in the back seat of your car. This is the safest position for an infant. NEVER place a rear-facing seat in the front seat of a vehicle with passenger airbags.

	the First Years formerly Compass - Click for more info Compass was founded by a group of fathers who had spent years in the corporate world developing child care products. Disillusioned with the slew of problems that come with working for a giant conglomerate, this group set out the make their own mark on the child care industry in 2003. Compass' first innovative booster seat, the B500, started shipping in January of 2004. This was the first foldable belt-positioning booster on the market, and its design was so praised by the industry that Compass received a Juvenile Products Manufacturing Association (JPMA) Innovation Award 5 months after its release. The great minds at Compass have now taken the next step with their success by releasing some fantastic infant car seats and compatible strollers, all of which are designed with the same innovative simplicity that make Compass Boosters such a sought after product. No longer just "The Booster People", Compass is making a serious run at the competition by offering the I-410 and I-420 Infant Car Seats , as well as the Magnesium S330 Stroller and Magnesium T730 Travel System.