Several carmakers were threatened by predictions given by automotive analyst that this year, for the first time in a decade, yearly new passenger cars and light truck overall sales will decline below 16 million. That's why, these aggressive auto manufacturers didn't waste any time in bringing up the best promotions and marketing strategies are mostly intended for the upcoming Presidents' Day weekend.

"We at Edmunds.com anticipate that fewer than 15.9 million new cars and light trucks will be sold in 2008. This makes for a very competitive marketplace, as automakers will do whatever it takes to maintain or grow their market share even as the market shrinks," says Jessica Caldwell, an analyst for Edmunds.com.

"This weekend is a great opportunity for car shoppers to walk into a car dealership and get a good deal. But, especially when shopping on major sales days, it's important that consumers do their research on each element of the deal, including the average transaction price of both the new car and their trade-in as well as the interest rate for which they qualify, so they are sure to save money," says Edmunds.com Senior Consumer Advice Editor Philip Reed.

Here are the list of vehicles with great incentives and best deals offered during Presidents' Day weekend:

Convertibles
2008 Audi A4 2.0T 2dr Convertible
2008 Volkswagen Eos Turbo 2dr Convertible
2008 Mazda MX-5 Miata Sport 2dr Convertible
2008 Saab 9-3 2.0T 2dr Convertible
2008 Chrysler Sebring Touring 2dr Convertible
2008 Mercedes-Benz SL-Class SL550 2dr Convertible
 
Coupes
2008 Mitsubishi Eclipse SE 2dr Hatchback
2008 Mercedes-Benz CLK-Class CLK350 2dr Coupe
2008 Infiniti G37 Journey 2dr Coupe
2008 Mazda RX-8 Sport 4dr Coupe
2008 BMW Z4 3.0si 2dr Hatchback
2008 Volvo C30 T5 Version 2.0 2dr Hatchback
 
Hybrids
2008 Nissan Altima Hybrid 4dr Sedan (2.5L 4cyl gas/electric hybrid CVT)
 
Minivans
2008 Mazda MAZDA5 Touring 4dr Minivan
2008 Nissan Quest 3.5 S 4dr Minivan
2008 Chrysler Town and Country LX 4dr Ext Minivan
2008 Toyota Sienna Limited 7-Passenger 4dr Minivan
 
Sedans
2008 Hyundai Sonata GLS 4dr Sedan
2008 Mitsubishi Galant Ralliart V6 4dr Sedan
2008 Volvo S80 3.2 4dr Sedan
2008 Honda Accord EX 4dr Sedan
2008 Chrysler 300 LX 4dr Sedan
2008 Saturn Aura XE 4dr Sedan
 
SUVs
2008 Saab 9-7X 4.2i 4dr SUV AWD
2008 Lexus RX 350 4dr SUV
2008 Mazda CX-7 Sport 4dr SUV
2008 Nissan Xterra SE 4dr SUV
2008 Chevrolet Equinox LTZ 4dr SUV AWD
2008 Volvo XC90 3.2 4dr SUV
 
Trucks
2008 Honda Ridgeline RT 4dr Crew Cab AWD SB
2008 Nissan Frontier SE 4dr Crew Cab 5.0 ft. SB
2008 Nissan Titan XE 4dr King Cab 4WD LB
2008 Dodge Ram Pickup 1500 Laramie 4dr Quad Cab SB
2008 Chevrolet Silverado 1500 LTZ 4dr Extended Cab
2008 Ford F-150 Lariat 4dr SuperCrew Styleside 6.5 ft. SB (5.4L 8cyl 4A)
 
Wagons
2008 Jaguar X-Type 3.0L Sportwagon 4dr Wagon AWD
2008 Dodge Magnum 4dr Wagon
2008 Audi A3 2.0T 4dr Wagon
2008 Volkswagen Passat Turbo 4dr Wagon
2008 Toyota Matrix XR 4dr Wagon
2008 Chrysler PT Cruiser 4dr Wagon