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Cadillac STS vs Mercedes-Benz C55 AMG

Side-by-side comparison from manufacturer specifications, NHTSA safety data, and live dealer listings.

Vehicles

Cadillac logo

2011 Cadillac STS

Mercedes-Benz logo

2006 Mercedes-Benz C55 AMG

Overview

SpecCadillac STSV6 Luxury SportMercedes-Benz C55 AMGC55 AMG
Selected trimV6 Luxury SportC55 AMG
Body styleSedanSedan
Drivetrainrear wheel driverear wheel drive
Fuel typeregular unleadedpremium unleaded (required)
Transmission6-speed shiftable automatic5-speed shiftable automatic
Engine typegasgas
Model year20112006

Pricing & market

SpecCadillac STSV6 Luxury SportMercedes-Benz C55 AMGC55 AMG
MSRP$47,280 (best)$54,450
For sale now00

Fuel economy & range

SpecCadillac STSV6 Luxury SportMercedes-Benz C55 AMGC55 AMG
Combined MPG21 MPG (best)17 MPG
City MPG18 MPG (best)15 MPG
Highway MPG27 MPG (best)20 MPG
Fuel tank17 gal (best)—

Performance

SpecCadillac STSV6 Luxury SportMercedes-Benz C55 AMGC55 AMG
Horsepower302 hp362 hp (best)
Torque272 lb-ft376 lb-ft (best)
Engine size3.6 L5.4 L (best)
CylindersV6V8

Size & capability

SpecCadillac STSV6 Luxury SportMercedes-Benz C55 AMGC55 AMG
Seating5 seats5 seats
Doors44
Cargo volume13.8 cu ft (best)12.2 cu ft
Towing capacity1,000 lbs (best)—
Curb weight3,973 lbs3,540 lbs (best)
Wheelbase116.4 in (best)106.9 in
Length196.7 in (best)181.8 in
Width72.6 in (best)68 in
Height57.6 in (best)55.6 in

Safety & recalls

SpecCadillac STSV6 Luxury SportMercedes-Benz C55 AMGC55 AMG
Rollover5 / 5 ★ (best)—
Open recalls (YMM scope)None reportedNone reported

Highlighted values indicate the better figure for that spec when a clear winner exists. Specs reflect the selected trim for each vehicle. Drag a vehicle header to reorder columns. MSRP and specifications are manufacturer data; listing prices and inventory come from live dealer listings. Safety ratings are from NHTSA.

Trim overview

All available trims with MSRP. The trim selected above is highlighted; comparison specs use that selection.

TrimCadillac STSMercedes-Benz C55 AMG
1

V6 Luxury Sport

$47,280 MSRP(Currently comparing)

C55 AMG

$54,450 MSRP(Currently comparing)

2

V6 Luxury

$50,820 MSRP

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3

V6 Premium

$56,380 MSRP

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Cadillac STS vs Mercedes-Benz C55 AMG FAQ

Which is better: 2011 Cadillac STS or 2006 Mercedes-Benz C55 AMG?
It depends on priorities. OpenDealer compares 2011 Cadillac STS vs 2006 Mercedes-Benz C55 AMG on MSRP, fuel economy, horsepower, seating, towing, NHTSA safety ratings, and live market prices so you can weigh the tradeoffs.
Which costs less: 2011 Cadillac STS or 2006 Mercedes-Benz C55 AMG?
Based on starting MSRP, the 2011 Cadillac STS starts lower at $47,280.
Which has better startingMsrp: 2011 Cadillac STS or 2006 Mercedes-Benz C55 AMG?
The 2011 Cadillac STS leads on startingMsrp in this comparison (47,280).
Which has better combinedMpg: 2011 Cadillac STS or 2006 Mercedes-Benz C55 AMG?
The 2011 Cadillac STS leads on combinedMpg in this comparison (21).
Which has better horsepower: 2011 Cadillac STS or 2006 Mercedes-Benz C55 AMG?
The 2006 Mercedes-Benz C55 AMG leads on horsepower in this comparison (362).
Which has better maxTowingLbs: 2011 Cadillac STS or 2006 Mercedes-Benz C55 AMG?
The 2011 Cadillac STS leads on maxTowingLbs in this comparison (1,000).