BMW 3-Series BMW 3-Series 2020 Mercedes-Benz SLK Mercedes-Benz SLK 2008

We are 103,000+ car owners sharing real-world car information.

Join Us

BMW 3-Series 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.

BMW 3-Series vs. Mercedes-Benz SLK Invoice Comparison

Lowest Total Price: $59,195

BMW 3-Series M340i   
Difference: $11,605

Calculate Payments

  Down Payment Interest Rate Term
Model Year20202008
Model3-SeriesSLK
TrimM340iSLK55 AMG
Body4dr Sedan2dr Hardtop conv.
Base Price $54,000 $63,200
Luxury Design 0  
Navigation system 1,700 1,200
Metallic paint (extra cost) 550 710
Heated front seats 500  
Aluminum trim 0  
Leather seating surfaces 1,450  
Lighting Package   1,010
Premium II Package   1,410
iPod integration   375
Automatic climate control, front   720
Luxury Design 0  
Navigation system 1,565 1,116
Metallic paint (extra cost) 505 659
Heated front seats 460  
Aluminum trim 0  
Leather seating surfaces 1,335  
Lighting Package   939
Premium II Package   1,311
iPod integration   349
Automatic climate control, front   670
Options (change) 4,200 5,425
Options (change) 3,865 5,044
Destination 995 875
Gas Tax 0 1,300
Total Price $59,195 $70,800

Return to top

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

Dealer Price Quotes

Want to find out how much dealers are willing to discount these cars?

Request free, no-obligation BMW 3-Series dealer quotes or Mercedes-Benz SLK dealer quotes from dealers using our car quote form.

The process is easy and takes just a minute or two. You'll receive price quotes from local approved dealers within 48 hours.

TrueDelta Value Comparison: BMW 3-Series vs. Mercedes-Benz SLK

Lowest Adjusted Price and Invoice: BMW 3-Series M340i
TrueDelta Adjusted Price Difference: $8,600
TrueDelta Adjusted Invoice Difference: $58,334
Model Year20202008
Model3-SeriesSLK
TrimM340iSLK55 AMG
Body4dr Sedan2dr Hardtop conv.
Engine382hp I6355hp V8
TransmissionT8T7
DrivetrainRWDRWD
EPA Fuel Economy (city/highway)22/30 MPG14/20 MPG
Audio (watts, speakers)600, 16380, 11
Tire (rear if not all the same)225/45-18225/40-18
Total Price$59,195$70,800
Adjustments for Features0-3,005
Feature-Adjusted Total Price$59,195$67,795

Return to top

Features Comparison: BMW 3-Series vs. Mercedes-Benz SLK

Model Year20202008
Model3-SeriesSLK
TrimM340iSLK55 AMG
Body4dr Sedan2dr Hardtop conv.
Transmission and Drivetrain 
8-speed manually-shiftable automatic$1300 
7-speed manually-shiftable automatic $1200
RWD$0$0
Accessories 
Hands-free trunk or liftgate$100 
Power rear side windows$200 
Proximity key$250 
Remote app$25 
Tilt/telescoping steering wheel, manual$250 
Tilt/telescoping steering wheel, power $350
Wind blocker, small $100
Brakes, Airbags, and Other Safety 
Active or whiplash-reducing head restraints, front seats$0 
Rearview camera$200 
Side curtain airbags$350 
Temporary spare tire $150
Tires, run-flat$150 
Cargo Management 
Air-conditioned storage compartment$50 
Climate Control 
Automatic air recirculation$100 
Rear air vents with manual controls$150 
Engine / Motor 
Automatic start / stop$150 
Regenerative braking$0 
Exterior 
Body kit $0
Power retractable hardtop $6750
Rear spoiler $200
Sunroof$900 
Infotainment 
4G LTE connectivity$0 
App support$0 
Bluetooth audio streaming$25 
DVD-compatible player$0 
Handwriting recognition$200 
HD radio$50 
In-vehicle Internet$150 
iPod integration $100
Media drive$15 
MP3-compatible player$50 
Navigation map updates, three years$0 
S Voice support$0 
Satellite radio $200
Satellite radio - one year subscription$250 
Siri Eyes Free support$0 
Traffic + travel information$25 
USB port$25 
Voice control for external devices$0 
Voice control for nav and audio$100 
Instruments, Lights, and Mirrors 
Analog clock $25
Compass$0 
Cornering lights $50
Fog light, rear $100
Headlight washers $50
Illuminated visor mirror, driver$50 
Illuminated visor mirror, passenger$50 
LED headlights$1000 
Power-folding mirrors$50 
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 
Leather door panel trim $250
Manual thigh support length adjuster, driver seat$50 
Manual thigh support length adjuster, passenger seat$50 
Memory system, passenger seat $150
Metal pedals $75
No leather in second row $-300
Power seatback bolsters, driver seat$100 
Power seatback bolsters, passenger seat$100 
Synthetic suede inserts in leather seating surfaces $0
Suspension, Wheels, and Tires 
Electronic systems calibration selector$200 
Sport suspension (upgrade) $0
Transmission 
Steering-wheel-mounted transmission controls $100
Total Value of Features$7,065$10,070
Value of Feature Adjustments$0$3,005
Value of Feature Adjustments0-2,801

Return to top

Specifications Comparison: BMW 3-Series vs. Mercedes-Benz SLK

Model Year20202008
Model3-SeriesSLK
Body4dr Sedan2dr Hardtop conv.
Wheelbase112.2 in95.7 in
Length185.7 in160.7 in
Width71.9 in70.4 in
Height56.8 in51.0 in
Curb Weight3,849 lb.3,420 lb.
Fuel Capacity15.6 gal.18.5 gal.
Row 1 Headroom38.7 in37.9 in
Row 1 Shoulder Room56.0 in52.2 in
Row 1 Hip Room0.0 in54.6 in
Row 1 Legroom42.0 in42.5 in
Row 2 Headroom37.6 in0.0 in
Row 2 Shoulder Room54.6 in0.0 in
Row 2 Legroom35.2 in0.0 in
Cargo Volume,
Minimum
16.9 ft36.5 ft3
Cargo Volume,
Maximum
16.99.8 ft3

Return to top

Option Package Details
BMW 3-Series M340i

Luxury Design
FeatureValueRequested?
Additional chrome trim0No
Bright-finished exhaust tip(s)25Yes
Chrome interior accents (optional)0No
Total Requested25100%
Total Not Requested00%
Navigation system
FeatureValueRequested?
DVD-compatible player0No
Voice control for nav and audio100No
Media drive15No
In-vehicle Internet150No
Handwriting recognition200No
Siri Eyes Free support0No
S Voice support0No
4G LTE connectivity0No
Navigation map updates, three years0No
Navigation system600Yes
Traffic + travel information25No
Remote app25No
Total Requested60054%
Total Not Requested51546%

Option Package Details
Mercedes-Benz SLK SLK55 AMG

Lighting Package
FeatureValueRequested?
Xenon HID headlights500Yes
Headlight washers50No
Cornering lights50No
Total Requested50083%
Total Not Requested10017%
Premium II Package
FeatureValueRequested?
Bluetooth cell phone link100Yes
Surround sound250Yes
Harman/Kardon, 380W, 11 speakers (with subwoofer)350No
Aux input50Yes
Total Requested40053%
Total Not Requested35047%

Was this information useful?

We're glad we could help! Share this page:

We're so sorry! Tell us how we can improve it.

See TrueDelta's information for all Sedans and Wagons.
See TrueDelta's information for all BMW models.