Audi A6 / S6 Audi A6 / S6 2015 Mercedes-Benz SLK Mercedes-Benz SLK 2015

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Audi A6 / S6 vs. Mercedes-Benz SLK Price Comparison (MSRP)

The sticker prices, before adjusting for remaining feature differences. Usually these are the numbers you will see on the window stickers.

Models in short supply often sell at or even above these prices.

Audi A6 / S6 vs. Mercedes-Benz SLK Invoice Comparison

Lowest Total Price: $77,475

Audi A6 / S6 S6 4.0 TFSI   
Difference: $2,880

Lowest Total Invoice: $72,120

Audi A6 / S6 S6 4.0 TFSI   
Difference: $2,677

Calculate Payments

  Down Payment Interest Rate Term
Model Year20152015
ModelA6 / S6SLK
TrimS6 4.0 TFSISLK55 AMG
Body4dr Sedan2dr Hardtop conv.
Base Price $75,500 $70,900
Base Invoice $70,217 $65,937
Metallic paint (extra cost) 550 720
Carbon fiber trim 500 2,250
Multimedia Package   2,330
Automatic climate control, front   760
Obstacle detection, rear   970
Proximity key   650
Illuminated door sill trim plates   850
Metallic paint (extra cost) 511 670
Carbon fiber trim 467 2,093
Multimedia Package   2,167
Automatic climate control, front   707
Obstacle detection, rear   902
Proximity key   605
Illuminated door sill trim plates   791
Options (change) 1,050 8,530
Options (change) 978 7,935
Destination 925 925
Total Price $77,475 $80,355
Total Invoice $72,120 $74,797

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While we strive for accuracy, the site is not error-free, and prices can change at any time.

Dealer Price Quotes

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Request free, no-obligation Audi A6 / S6 dealer quotes or Mercedes-Benz SLK dealer quotes from dealers using our car quote form.

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TrueDelta Value Comparison: Audi A6 / S6 vs. Mercedes-Benz SLK

Lowest Adjusted Price and Invoice: Audi A6 / S6 S6 4.0 TFSI
TrueDelta Adjusted Price Difference: $1,935
TrueDelta Adjusted Invoice Difference: $1,797
Model Year20152015
ModelA6 / S6SLK
TrimS6 4.0 TFSISLK55 AMG
Body4dr Sedan2dr Hardtop conv.
Engine420hp V8415hp V8
TransmissionS7T7
DrivetrainAWDRWD
EPA Fuel Economy (city/highway)17/27 MPG19/28 MPG
Audio (watts, speakers)630, 14500, 11
Tire (rear if not all the same)255/40-19235/40-18
Total Price$77,475$80,355
Adjustments for Features0-945
Feature-Adjusted Total Price$77,475$79,410
Total Invoice$72,120$74,797
Adjustments for Features0-880
Feature-Adjusted Total Invoice$72,120$73,917

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Features Comparison: Audi A6 / S6 vs. Mercedes-Benz SLK

Model Year20152015
ModelA6 / S6SLK
TrimS6 4.0 TFSISLK55 AMG
Body4dr Sedan2dr Hardtop conv.
Transmission and Drivetrain 
7-speed automated manual$1200 
7-speed manually-shiftable automatic $1200
AWD$1700 
RWD $0
Accessories 
Parking guidance system - passive $250
Power rear side windows$200 
Remote app $25
Remote window/roof operation $15
Brakes, Airbags, and Other Safety 
Active or whiplash-reducing head restraints, front seats $0
Blind spot warning system$200 
Collision preparation system, rear$100 
Driver drowsiness monitor $150
Rearview camera$200 
Roll bar $200
Rollover sensor$50 
Torque vectoring, brake-based $100
Cargo Management 
Cargo net$40 
Rear seat pass-through$100 
Climate Control 
Automatic air recirculation$100 
Rear air vents with automatic controls$250 
Rear dual-zone climate control$125 
Drivetrain 
Active rear differential$500 
Engine / Motor 
Automatic start / stop $150
Regenerative braking$0 
Exterior 
Glass roof panel(s) $300
Power retractable hardtop $6750
Rear spoiler $200
Sunroof$900 
Infotainment 
App support $0
Handwriting recognition$200 
iPod integration$100 
Navigation map updates, three years $0
SD Card slot $25
SMS text-to-speech reader $25
Telematics service, such as OnStar, with navigation $225
USB port $25
Wi-Fi hotspot$50 
Instruments, Lights, and Mirrors 
Analog clock $25
Auto-dimming headlights $200
Auto-dimming passenger-side mirror$75 
Cornering lights$50 
Head-up display (HUD)$350 
Headlight washers $50
Illuminated visor mirror, driver$50 
Illuminated visor mirror, passenger$50 
LED headlights$1000 
Steering-linked headlights $150
Visor mirror, driver $10
Visor mirror, passenger $10
Xenon HID headlights $500
Seats and Interior Trim 
Center armrest(s), second row$50 
Folding second row seats$300 
Memory system, passenger seat $150
Neck-level heating, front seats $150
No leather in second row $-300
Synthetic suede inserts in leather seating surfaces $0
Suspension, Wheels, and Tires 
Adaptive dampers - electrical$500 
Air suspension, auto-leveling and height adjustable$1000 
Electronic systems calibration selector$200 
Total Value of Features$9,640$10,585
Value of Feature Adjustments$0$945
Value of Feature Adjustments0-880

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Specifications Comparison: Audi A6 / S6 vs. Mercedes-Benz SLK

Model Year20152015
ModelA6 / S6SLK
Body4dr Sedan2dr Hardtop conv.
Wheelbase114.7 in95.7 in
Length193.9 in162.8 in
Width73.8 in71.5 in
Height57.8 in51.2 in
Curb Weight4,398 lb.3,583 lb.
Fuel Capacity19.8 gal.15.9 gal.
Row 1 Headroom37.2 in38.0 in
Row 1 Shoulder Room57.5 in52.2 in
Row 1 Legroom41.3 in42.5 in
Row 2 Headroom37.8 in0.0 in
Row 2 Shoulder Room56.3 in0.0 in
Row 2 Legroom37.4 in0.0 in
Cargo Volume,
Minimum
14.1 ft36.4 ft3
Cargo Volume,
Maximum
14.110.1 ft3

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Option Package Details
Mercedes-Benz SLK SLK55 AMG

Automatic climate control, front
FeatureValueRequested?
Automatic climate control, front200Yes
Dual-zone climate control125Yes
Total Requested325100%
Total Not Requested00%
Obstacle detection, rear
FeatureValueRequested?
Obstacle detection, rear250Yes
Obstacle detection, front150Yes
Parking guidance system - passive250No
Total Requested40062%
Total Not Requested25038%
Multimedia Package
FeatureValueRequested?
DVD-compatible player0Yes
Media drive15Yes
Traffic + travel information25Yes
SD Card slot25No
In-vehicle Internet150Yes
App support0No
Navigation map updates, three years0No
Navigation system600Yes
Voice control for nav and audio100Yes
Total Requested89097%
Total Not Requested253%

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