Genuine Mercedes-Benz Step Rails

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Driving a Mercedes-Benz SUV? There's a chance it came with step rails. You might also refer to them as side rails. Less often, you might even hear them called running boards. The sports car community also has their own name for them: nerf bars. The term is taken from "nerfing," meaning bumping into another racer. Despite their many names, what a step rail does is provide a better surface than a bare door sill for getting into and out of your vehicle.

If you know them already, you probably already know they mount just inches from sills, and that you can install them lower than that to make entry and exit even easier. Doing that is especially advantageous if you're driving a lifted SUV. Running boards are a little different from step rails and side rails, though. They mount closer to your vehicle's rocker panels, or flush with them. That provides better ground clearance. Running boards also often have flatter and wider profiles, and their treads often run the length of the boards.

Update your Mercedes-Benz with Genuine OEM Step Rails

Whatever kind you need for a replacement or an upgrade, we've got the best solutions: genuine step rails straight from Mercedes-Benz. Save time and buy them online today, right here at our auto parts counter.

Side Rail
Part Number: 221-630-24-40
Positions: Right
Other Names: Support More Names
Fits:
  • Mercedes-Benz:
    • S 350,
    • S 400,
    • S 550,
    • S 600,
    • S 63 AMG®,
    • S 65 AMG®
  • 1 more
$1,062.00
$1,062.00
Side Rail
Part Number: 230-620-27-34
Positions: Left
Other Names: Support More Names
Fits:
  • Mercedes-Benz:
    • SL 500,
    • SL 55 AMG®,
    • SL 550,
    • SL 600,
    • SL 63 AMG®,
    • SL 65 AMG®
  • 1 more
$543.83
$543.83
Side Rail
Part Number: 463-311-21-00
Positions: Left Outer
Other Names: Longitudinal Member More Names
Description: Outer. More Info
Notes: Included with frame assembly. More Notes
Fits:
  • Mercedes-Benz:
    • G 550,
    • G 63 AMG®
$1,368.80
$1,368.80
Side Rail
Part Number: 124-620-18-34
Positions: Right
Other Names: Support, Front End, Metal More Names
Description: Without 4-matic. 300td & 300te. E320. More Info
Notes: Included with apron assembly. Included with the front inner structure. More Notes
Fits:
  • Mercedes-Benz:
    • 260 E,
    • 300 CE,
    • 300 D,
    • 300 E,
    • 300 TD,
    • 300 TE,
    • 400 E,
    • 500 E,
    • E 300,
    • E 320,
    • E 420,
    • E 500
  • 7 more
MSRP $214.00
$156.16
MSRP $214.00
$156.16
Side Rail
Part Number: 124-630-01-35
Positions: Left Front, Left Inner
Other Names: Roof, Rail More Names
Description: Front, inner. More Info
Fits:
  • Mercedes-Benz:
    • 300 TD,
    • 300 TE,
    • E 320
$168.36
$168.36
Side Rail
Part Number: 124-630-03-13
Positions: Left Rear, Left Inner
Other Names: Rear Pillar More Names
Description: Rear, inner. More Info
Fits:
  • Mercedes-Benz:
    • 300 TD,
    • 300 TE,
    • E 320
MSRP $440.00
$322.08
MSRP $440.00
$322.08
Side Rail
Part Number: 124-637-07-09
Positions: Left Front, Left Outer
Other Names: Panel, Roof More Names
Description: Front, outer. More Info
Fits:
  • Mercedes-Benz:
    • 300 TD,
    • 300 TE,
    • E 320
MSRP $342.00
$208.62
MSRP $342.00
$208.62
Side Rail
Part Number: 124-637-18-09
Positions: Right Outer
Other Names: Panel, Roof More Names
Description: Coupe, outer. More Info
Fits:
  • Mercedes-Benz:
    • 300 CE,
    • E 320
MSRP $200.00
$125.00
MSRP $200.00
$125.00
Side Rail
Part Number: 124-770-02-34
Positions: Right Front
Other Names: Rail, Folding Top More Names
Description: Hardware & components, front. More Info
Fits:
  • Mercedes-Benz:
    • 300 CE,
    • E 320
MSRP $110.00
$82.50
MSRP $110.00
$82.50
Side Rail
Part Number: 124-770-09-34
Positions: Left
Other Names: Rail, Folding Top More Names
Description: Hardware & components, center. More Info
Fits:
  • Mercedes-Benz:
    • 300 CE,
    • E 320
MSRP $129.00
$96.25
MSRP $129.00
$96.25
Side Rail
Part Number: 126-637-06-47
Positions: Right Outer
Other Names: Rail, Roof Rail More Names
Description: Side, outer. More Info
Fits:
  • Mercedes-Benz:
    • 300 SD,
    • 380 SE,
    • 500 SEC,
    • 500 SEL,
    • 560 SEC
MSRP $92.00
$68.75
MSRP $92.00
$68.75
Side Rail
Part Number: 126-637-10-47
Positions: Right Outer
Other Names: Roof Rail More Names
Description: Outer, 300se. More Info
Fits:
  • Mercedes-Benz:
    • 300 SE
MSRP $119.00
$88.75
MSRP $119.00
$88.75
Side Rail
Part Number: 129-610-16-10
Positions: Right
Other Names: Side Member More Names
Fits:
  • Mercedes-Benz:
    • 300 SL,
    • 500 SL,
    • 600 SL,
    • SL 320,
    • SL 500,
    • SL 600
  • 1 more
MSRP $1,000.00
$708.00
MSRP $1,000.00
$708.00
Side Rail
Part Number: 129-697-08-20
Positions: Right
Other Names: Rail More Names
Fits:
  • Mercedes-Benz:
    • 300 SL,
    • 500 SL,
    • 600 SL,
    • SL 320,
    • SL 500,
    • SL 600
  • 1 more
MSRP $74.00
$56.32
MSRP $74.00
$56.32
Side Rail
Part Number: 140-630-07-35
Positions: Left Inner
Other Names: Roof Rail More Names
Description: Inner. More Info
Fits:
  • Mercedes-Benz:
    • 500 SEC,
    • 600 SEC,
    • CL 500,
    • CL 600,
    • S 500,
    • S 600
  • 1 more
$56.96
$56.96
Side Rail
Part Number: 140-630-08-35
Positions: Right Inner
Other Names: Roof Rail More Names
Description: Inner. More Info
Fits:
  • Mercedes-Benz:
    • 500 SEC,
    • 600 SEC,
    • CL 500,
    • CL 600,
    • S 500,
    • S 600
  • 1 more
$56.96
$56.96
Side Rail
Part Number: 140-637-14-47
Positions: Right
Other Names: Roof Rail More Names
Description: 400sel, s420, 500sel, s500, 600sel, s600, s320. More Info
Fits:
  • Mercedes-Benz:
    • 400 SEL,
    • 500 SEL,
    • 600 SEL,
    • S 320,
    • S 420,
    • S 500,
    • S 600
  • 2 more
MSRP $740.00
$528.36
MSRP $740.00
$528.36
Side Rail
Part Number: 163-310-03-19
Positions: Right Front
Other Names: Side Member More Names
Replaces: 163-310-00-19, 163-310-02-19, 163-311-00-02
Description: Front. More Info
Notes: Included with frame assembly. More Notes
Fits:
  • Mercedes-Benz:
    • ML 320,
    • ML 350,
    • ML 430,
    • ML 500,
    • ML 55 AMG®
MSRP $182.00
$132.98
MSRP $182.00
$132.98
Side Rail
Part Number: 202-620-16-34
Positions: Right
Other Names: Support, Front Panel, Metl More Names
Notes: Included with the front inner structure. More Notes
Fits:
  • Mercedes-Benz:
    • C 220,
    • C 230,
    • C 280
MSRP $520.00
$370.09
MSRP $520.00
$370.09
Side Rail
Part Number: 203-630-06-35
Positions: Right Inner, Right Rear
Other Names: Roof Rail More Names
Replaces: 203-636-08-46
Description: Sedan, wagon, wagon, inner, rear. More Info
Fits:
  • Mercedes-Benz:
    • C 240,
    • C 320
$121.25
$121.25
Side Rail
Part Number: 203-636-01-46
Positions: Left Inner, Left Rear
Other Names: Roof Rail More Names
Description: Sedan, wagon, sedan, inner, rear. This item is non-returnable. More Info
Fits:
  • Mercedes-Benz:
    • C 230,
    • C 240,
    • C 280,
    • C 32 AMG®,
    • C 320,
    • C 350,
    • C 55 AMG®
  • 2 more
$36.12
$36.12
Side Rail
Part Number: 203-636-10-21
Positions: Right Inner, Right Front, Right Front Inner, Front Right Inner Inner, Front Right Inner Front, Front Right Inner Front Inner
Other Names: Roof Side Rail, Roof Rail More Names
Description: Coupe, inner, front. More Info
Fits:
  • Mercedes-Benz:
    • C 230,
    • C 320
$49.28
$49.28
Side Rail
Part Number: 203-637-01-47
Positions: Left Outer
Other Names: Roof Rail More Names
Description: Sedan, wagon, sedan, outer. More Info
Fits:
  • Mercedes-Benz:
    • C 230,
    • C 240,
    • C 280,
    • C 32 AMG®,
    • C 320,
    • C 350,
    • C 55 AMG®
  • 2 more
$379.61
$379.61
Side Rail
Part Number: 203-637-02-47
Positions: Right Outer
Other Names: Roof Rail More Names
Description: Sedan, wagon, sedan, outer. More Info
Fits:
  • Mercedes-Benz:
    • C 230,
    • C 240,
    • C 280,
    • C 32 AMG®,
    • C 320,
    • C 350,
    • C 55 AMG®
  • 2 more
$379.61
$379.61
Side Rail
Part Number: 203-637-04-47
Positions: Right Outer, Right Outer Outer
Other Names: Roof Side Rail, Roof Rail More Names
Description: Coupe, outer. More Info
Fits:
  • Mercedes-Benz:
    • C 230,
    • C 320
$379.61
$379.61
Side Rail
Part Number: 204-620-44-34
Positions: Right Inner, Front Right Inner Inner
Other Names: Rail Section, Inner Rail, Frame Stiffener, Support More Names
Description: 2010-15. Coupe, inner rail. Sedan,. Coupe/convertible,. More Info
Notes: Included with apron/rail assembly. Included with apron assembly. Part replacement requires adhesive. More Notes
Fits:
  • Mercedes-Benz:
    • C 250,
    • C 300,
    • C 350,
    • C 63 AMG®,
    • E 350,
    • E 400,
    • E 550,
    • GLK 250,
    • GLK 350
  • 4 more
$240.34
$240.34
Side Rail
Part Number: 204-780-01-12-64
Positions: Left
Other Names: Sunroof Guide Rail, Guide, Angle More Names
Replaces: 204-780-01-12
Description: Sedan, without panorama. More Info
Notes: Included with frame assembly. More Notes
Fits:
  • Mercedes-Benz:
    • C 250,
    • C 300,
    • C 350,
    • C 63 AMG®,
    • E 350,
    • E 550,
    • E 63 AMG®
  • 2 more
MSRP $102.00
$76.25
MSRP $102.00
$76.25
Side Rail
Part Number: 204-780-02-12
Positions: Right
Other Names: Sunroof Guide Rail, Guide, Angle More Names
Description: Sedan, without panorama. More Info
Notes: Included with frame assembly. More Notes
Fits:
  • Mercedes-Benz:
    • C 250,
    • C 300,
    • C 350,
    • C 63 AMG®,
    • E 350,
    • E 550,
    • E 63 AMG®
  • 2 more
MSRP $122.00
$91.25
MSRP $122.00
$91.25
Side Rail
Part Number: 205-610-02-23
Positions: Right
Other Names: Longitudinal Member More Names
Description: Coupe, convertible, convertible. Sedan,. More Info
Fits:
  • Mercedes-Benz:
    • C 300,
    • C 350e,
    • C 400,
    • C 43 AMG®,
    • C 450 AMG®,
    • C 63 AMG®,
    • C 63 AMG® S
  • 2 more
$128.10
$128.10
Side Rail
Part Number: 211-890-01-93
Positions: Left
Other Names: Roof Luggage Carrier Side Rail, Roof Railing More Names
Description: Wagon. More Info
Fits:
  • Mercedes-Benz:
    • E 350,
    • E 63 AMG®
$335.50
$335.50
Side Rail
Part Number: 215-630-14-40
Positions: Right, Front Right
Other Names: Fender Rail, Support More Names
Notes: Included with apron/rail assembly. More Notes
Fits:
  • Mercedes-Benz:
    • CL 500,
    • CL 55 AMG®,
    • CL 600,
    • CL 65 AMG®
$334.28
$334.28
Side Rail
Part Number: 215-919-23-20-9B51
Positions: Left
Other Names: Seat Track Cover, Covering More Names
Description: Anthracite. More Info
Notes: Order by color. More Notes
Fits:
  • Mercedes-Benz:
    • CL 500,
    • CL 55 AMG®,
    • CL 600,
    • CL 65 AMG®
MSRP $22.50
$17.42
MSRP $22.50
$17.42
Side Rail
Part Number: 215-919-24-20-1A26
Positions: Right
Other Names: Seat Track Cover, Covering More Names
Description: Java. More Info
Notes: Order by color. More Notes
Fits:
  • Mercedes-Benz:
    • CL 500,
    • CL 55 AMG®,
    • CL 600,
    • CL 65 AMG®
MSRP $21.00
$16.13
MSRP $21.00
$16.13
Side Rail
Part Number: 215-919-24-20-8G69
Positions: Right
Other Names: Seat Track Cover, Covering More Names
Description: Quartz. More Info
Notes: Order by color. More Notes
Fits:
  • Mercedes-Benz:
    • CL 500,
    • CL 55 AMG®,
    • CL 600,
    • CL 65 AMG®
MSRP $26.00
$20.00
MSRP $26.00
$20.00
Side Rail
Part Number: 4536100801
Positions: Left
Other Names: Longitudinal Member More Names
Fits:
  • Smart:
    • EQ fortwo,
    • Fortwo
MSRP $476.00
$428.40
MSRP $476.00
$428.40
Side Rail
Part Number: 123-782-01-24
Positions: Left
Other Names: Rail, Rail, Sliding Roof More Names
Description: Panel & frame. More Info
Fits:
  • Mercedes-Benz:
    • 190 D,
    • 190 E,
    • 300 CD
MSRP $164.00
$122.50
MSRP $164.00
$122.50
Side Rail
Part Number: 123-840-00-14
Positions: Right
Other Names: Bracket, Roof, Metal More Names
Fits:
  • Mercedes-Benz:
    • 300 TD
MSRP $92.00
$68.75
MSRP $92.00
$68.75
Side Rail
Part Number: 124-620-21-34
Positions: Left
Other Names: Support, Front End, Metal More Names
Description: With 4-matic. 300te 4-matic. More Info
Notes: Included with apron assembly. Included with the front inner structure. More Notes
Fits:
  • Mercedes-Benz:
    • 300 E,
    • 300 TE
MSRP $400.00
$292.80
MSRP $400.00
$292.80
Side Rail
Part Number: 124-620-22-34
Positions: Right
Other Names: Support, Front End, Metal More Names
Description: With 4-matic. 300te 4-matic. More Info
Notes: Included with apron assembly. Included with the front inner structure. More Notes
Fits:
  • Mercedes-Benz:
    • 300 E,
    • 300 TE
MSRP $400.00
$292.80
MSRP $400.00
$292.80
Side Rail
Part Number: 124-630-02-35
Positions: Right Front, Right Inner
Other Names: Roof Rail More Names
Description: Front, inner. More Info
Fits:
  • Mercedes-Benz:
    • 300 TD,
    • 300 TE,
    • E 320
$168.36
$168.36
Side Rail
Part Number: 124-637-07-46
Positions: Left Inner
Other Names: Roof Rail More Names
Description: Coupe, inner. More Info
Fits:
  • Mercedes-Benz:
    • 300 CE,
    • E 320
MSRP $100.00
$75.00
MSRP $100.00
$75.00
Side Rail
Part Number: 124-637-08-46
Positions: Right Inner
Other Names: Roof Rail More Names
Description: Coupe, inner. More Info
Fits:
  • Mercedes-Benz:
    • 300 CE,
    • E 320
$85.00
$85.00
Side Rail
Part Number: 124-637-09-09
Positions: Left Rear, Left Outer
Other Names: Panel, Roof More Names
Description: Rear, outer. More Info
Fits:
  • Mercedes-Benz:
    • 300 TD,
    • 300 TE,
    • E 320
MSRP $358.00
$218.38
MSRP $358.00
$218.38
Side Rail
Part Number: 124-637-17-09
Positions: Left Outer
Other Names: Panel, Roof More Names
Description: Coupe, outer. More Info
Fits:
  • Mercedes-Benz:
    • 300 CE,
    • E 320
MSRP $120.00
$75.00
MSRP $120.00
$75.00
Side Rail
Part Number: 126-637-06-46
Positions: Right Inner
Other Names: Rail, Roof Rail More Names
Description: Side, inner. More Info
Fits:
  • Mercedes-Benz:
    • 500 SEC,
    • 560 SEC
MSRP $85.00
$63.75
MSRP $85.00
$63.75
Side Rail
Part Number: 129-692-02-00-9051
Positions: Right
Other Names: Paneling More Names
Fits:
  • Mercedes-Benz:
    • SL 500,
    • SL 600
MSRP $50.00
$38.70
MSRP $50.00
$38.70
Side Rail
Part Number: 140-637-05-47
Positions: Left Outer
Other Names: Roof Rail More Names
Description: Outer. More Info
Fits:
  • Mercedes-Benz:
    • 500 SEC,
    • 600 SEC,
    • CL 500,
    • CL 600,
    • S 500,
    • S 600
  • 1 more
MSRP $184.00
$134.20
MSRP $184.00
$134.20
Side Rail
Part Number: 140-637-06-47
Positions: Right Outer
Other Names: Roof Rail More Names
Description: Outer. More Info
Fits:
  • Mercedes-Benz:
    • 500 SEC,
    • 600 SEC,
    • CL 500,
    • CL 600,
    • S 500,
    • S 600
  • 1 more
MSRP $184.00
$134.20
MSRP $184.00
$134.20
Side Rail
Part Number: 140-637-13-47
Positions: Left
Other Names: Roof Rail More Names
Description: 400sel, s420, 500sel, s500, 600sel, s600, s320. More Info
Fits:
  • Mercedes-Benz:
    • 400 SEL,
    • 500 SEL,
    • 600 SEL,
    • S 320,
    • S 420,
    • S 500,
    • S 600
  • 2 more
$452.20
$452.20
Side Rail
Part Number: 140-782-06-24
Positions: Right
Other Names: Rail, Rail, Sliding Roof More Names
Replaces: 126-782-12-24
Description: Frame & rails, side. Glass & components. Panels, side. Frame & components. Frame & panel, side. More Info
Fits:
  • Mercedes-Benz:
    • 300 SD,
    • 300 SDL,
    • 300 SE,
    • 300 SEL,
    • 350 SD,
    • 350 SDL,
    • 400 SE,
    • 400 SEL,
    • 420 SEL,
    • 500 SEL,
    • 560 SEL,
    • 600 SEL,
    • G 500,
    • G 55 AMG®,
    • G 550,
    • G 63 AMG®,
    • G 65 AMG®,
    • S 320,
    • S 350,
    • S 420,
    • S 500,
    • S 600
  • 17 more
MSRP $64.00
$48.81
MSRP $64.00
$48.81

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