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: 222-885-01-21
Positions: Right
Other Names: Rail, Mounting Rail More Names
Description: Sedan, s63, s65, bumper cover & components. Without amg line, bumper cover & components. Sedan, with amg line, bumper cover &... More Info
Fits:
  • Mercedes-Benz:
    • S 450,
    • S 550,
    • S 550e,
    • S 560,
    • S 600,
    • S 63 AMG®,
    • S 65 AMG®
  • 2 more
$8.70
$8.70
Side Rail
Part Number: 177-611-15-00
Positions: Left, Right, Front
Other Names: Floor Side Rail, Longitudinal Member More Names
Fits:
  • Mercedes-Benz:
    • A 220,
    • A 35 AMG®,
    • CLA 250,
    • CLA 35 AMG®,
    • CLA 45 AMG®,
    • GLB 250
  • 1 more
$330.40
$330.40
Side Rail
Part Number: 201-620-28-34
Positions: Right
Other Names: Support, Front End, Metal More Names
Fits:
  • Mercedes-Benz:
    • 190 D,
    • 190 E
MSRP $115.00
$79.30
MSRP $115.00
$79.30
Side Rail
Part Number: 203-610-04-10
Positions: Right
Other Names: Floor Side Rail, Side Member More Names
Description: Coupe/convertible, coupe. More Info
Fits:
  • Mercedes-Benz:
    • C 230,
    • C 240,
    • C 280,
    • C 32 AMG®,
    • C 320,
    • C 350,
    • C 55 AMG®,
    • CLK 320,
    • CLK 350,
    • CLK 500,
    • CLK 55 AMG®,
    • CLK 550,
    • CLK 63 AMG®
  • 8 more
$162.84
$162.84
Side Rail
Part Number: 203-620-28-34
Positions: Right
Other Names: Support More Names
Description: Sedan, wagon,. Coupe/convertible,. More Info
Notes: 21. More Notes
Fits:
  • Mercedes-Benz:
    • C 230,
    • C 240,
    • C 280,
    • C 32 AMG®,
    • C 320,
    • C 350,
    • C 55 AMG®,
    • CLK 320,
    • CLK 350,
    • CLK 500,
    • CLK 55 AMG®,
    • CLK 550,
    • CLK 63 AMG®
  • 8 more
$206.50
$206.50
Side Rail
Part Number: 203-637-03-47
Positions: Left Outer, Left Outer Outer
Other Names: Roof Side Rail, Roof Rail More Names
Description: Coupe, outer. More Info
Fits:
  • Mercedes-Benz:
    • C 230,
    • C 320
$373.23
$373.23
Side Rail
Part Number: 204-610-02-23
Positions: Right
Other Names: Side Member More Names
Fits:
  • Mercedes-Benz:
    • C 300,
    • C 350,
    • C 63 AMG®
$139.24
$139.24
Side Rail
Part Number: 204-784-06-09
Positions: Right
Other Names: Side Cover, Sunroof Guide Rail, Right Paneling More Names
Description: 2010-15. Sedan, with panorama roof. More Info
Notes: 15. More Notes
Fits:
  • Mercedes-Benz:
    • C 250,
    • C 300,
    • C 350,
    • C 63 AMG®,
    • GLK 250,
    • GLK 350
  • 1 more
$47.97
$47.97
Side Rail
Part Number: 123-782-02-24
Positions: Right
Other Names: Rail, Rail, Sliding Roof More Names
Description: Panel & frame. More Info
Fits:
  • Mercedes-Benz:
    • 190 D,
    • 190 E,
    • 300 CD
MSRP $12.50
$9.47
MSRP $12.50
$9.47
Side Rail
Part Number: 124-630-04-13
Positions: Right Rear, Right Inner
Other Names: Rear Pillar More Names
Description: Rear, inner. More Info
Fits:
  • Mercedes-Benz:
    • 300 TD,
    • 300 TE,
    • E 320
MSRP $89.00
$64.66
MSRP $89.00
$64.66
Side Rail
Part Number: 124-770-07-34
Positions: Left Rear
Other Names: Rail, Folding Top More Names
Description: Hardware & components, rear. More Info
Fits:
  • Mercedes-Benz:
    • 300 CE,
    • E 320
MSRP $164.00
$119.56
MSRP $164.00
$119.56
Side Rail
Part Number: 126-637-09-47
Positions: Left Outer
Other Names: Roof Rail More Names
Description: Outer, 300se. More Info
Fits:
  • Mercedes-Benz:
    • 300 SE
MSRP $119.00
$86.62
MSRP $119.00
$86.62
Side Rail
Part Number: 126-637-11-47
Positions: Left Outer
Other Names: Roof Rail More Names
Description: Outer, all others. More Info
Fits:
  • Mercedes-Benz:
    • 300 SDL,
    • 300 SEL,
    • 350 SD,
    • 350 SDL,
    • 420 SEL,
    • 560 SEL
  • 1 more
MSRP $117.00
$85.40
MSRP $117.00
$85.40
Side Rail
Part Number: 129-620-22-34
Positions: Right
Other Names: Support, Front End, Metal More Names
Fits:
  • Mercedes-Benz:
    • 300 SL,
    • 500 SL,
    • 600 SL,
    • SL 320,
    • SL 500,
    • SL 600
  • 1 more
MSRP $520.00
$365.04
MSRP $520.00
$365.04
Side Rail
Part Number: 129-692-01-00-9051
Positions: Left
Other Names: Paneling More Names
Fits:
  • Mercedes-Benz:
    • SL 500,
    • SL 600
MSRP $50.00
$38.40
MSRP $50.00
$38.40
Side Rail
Part Number: 140-782-05-24
Positions: Left
Other Names: Rail, Rail, Sliding Roof More Names
Replaces: 126-782-11-24
Description: Panels, side. Frame & rails, side. Glass & components. 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 $75.00
$54.74
MSRP $75.00
$54.74
Side Rail
Part Number: 163-311-02-02
Positions: Right Rear
Other Names: Side Member More Names
Replaces: 163-311-01-02
Description: Rear. More Info
Fits:
  • Mercedes-Benz:
    • ML 320,
    • ML 350,
    • ML 430,
    • ML 500,
    • ML 55 AMG®
MSRP $115.00
$84.18
MSRP $115.00
$84.18
Side Rail
Part Number: 164-890-01-93
Positions: Left
Other Names: Support More Names
Fits:
  • Mercedes-Benz:
    • GL 320,
    • GL 350,
    • GL 450,
    • GL 550
$477.36
$477.36
Side Rail
Part Number: 164-890-02-93
Positions: Right
Other Names: Support More Names
Fits:
  • Mercedes-Benz:
    • GL 320,
    • GL 350,
    • GL 450,
    • GL 550
$475.02
$475.02
Side Rail
Part Number: 211-840-09-24
Positions: Left
Other Names: Roof Luggage Carrier Side Rail, Support More Names
Description: Wagon. More Info
Fits:
  • Mercedes-Benz:
    • E 320,
    • E 350,
    • E 500,
    • E 55 AMG®
$430.56
$430.56
Side Rail
Part Number: 215-919-23-20-1A26
Positions: Left
Other Names: Seat Track Cover, Covering More Names
Description: Java. More Info
Fits:
  • Mercedes-Benz:
    • CL 500,
    • CL 55 AMG®,
    • CL 600,
    • CL 65 AMG®
MSRP $22.00
$16.64
MSRP $22.00
$16.64
Side Rail
Part Number: 215-919-23-20-7D43
Positions: Left
Other Names: Seat Track Cover, Covering More Names
Description: Gray. More Info
Fits:
  • Mercedes-Benz:
    • CL 500,
    • CL 55 AMG®,
    • CL 600,
    • CL 65 AMG®
MSRP $26.00
$19.84
MSRP $26.00
$19.84
Side Rail
Part Number: 220-630-11-40
Positions: Left
Other Names: Support More Names
Replaces: 220-630-05-40
Fits:
  • Mercedes-Benz:
    • S 350,
    • S 430,
    • S 500,
    • S 55 AMG®,
    • S 600,
    • S 65 AMG®
  • 1 more
$24.96
$24.96
Side Rail
Part Number: 221-630-21-40
Positions: Left
Other Names: Support More Names
Fits:
  • Mercedes-Benz:
    • S 350,
    • S 400,
    • S 550,
    • S 600,
    • S 63 AMG®,
    • S 65 AMG®
  • 1 more
$885.50
$885.50
Side Rail
Part Number: 453-610-07-01
Positions: Right
Other Names: Longitudinal Member More Names
Fits:
  • Smart:
    • EQ fortwo,
    • Fortwo
MSRP $280.00
$229.60
MSRP $280.00
$229.60
Side Rail
Part Number: 204-620-45-34
Positions: Left Inner, Front Left Inner Inner
Other Names: Rail Section, Inner Rail, Frame Stiffener, Support More Names
Description: Sedan,. 2010-15. Coupe, convertible, inner rail. More Info
Notes: 15. 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
$210.04
$210.04
Side Rail
Part Number: 209-780-06-61
Positions: Right
Other Names: Mounting Rail More Names
Description: Coupe/convertible, coupe. More Info
Fits:
  • Mercedes-Benz:
    • CLK 320,
    • CLK 350,
    • CLK 500,
    • CLK 55 AMG®,
    • CLK 550,
    • CLK 63 AMG®
  • 1 more
MSRP $32.00
$24.32
MSRP $32.00
$24.32
Side Rail
Part Number: 211-840-10-24
Positions: Right
Other Names: Roof Luggage Carrier Side Rail, Support More Names
Description: Wagon. More Info
Fits:
  • Mercedes-Benz:
    • E 320,
    • E 350,
    • E 500,
    • E 55 AMG®
$632.50
$632.50
Side Rail
Part Number: 222-885-00-21
Positions: Left
Other Names: Rail, Mounting Rail More Names
Description: Sedan, s63, s65, bumper cover & components. Bumper cover & components, without amg pkg. Without amg line, bumper cover & components.... More Info
Fits:
  • Mercedes-Benz:
    • S 450,
    • S 550,
    • S 550e,
    • S 560,
    • S 600,
    • S 63 AMG®,
    • S 65 AMG®
  • 2 more
$8.70
$8.70
Side Rail
Part Number: 230-620-28-34
Positions: Right
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
$434.07
$434.07
Side Rail
Part Number: 463-311-19-00
Positions: Left Inner
Other Names: Longitudinal Member More Names
Description: Inner. More Info
Fits:
  • Mercedes-Benz:
    • G 550,
    • G 63 AMG®
$1,334.00
$1,334.00
Side Rail
Part Number: 463-311-20-00
Positions: Right Inner
Other Names: Longitudinal Member More Names
Description: Inner. More Info
Fits:
  • Mercedes-Benz:
    • G 550,
    • G 63 AMG®
$1,518.00
$1,518.00
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
$119.56
MSRP $164.00
$119.56
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
$67.10
MSRP $92.00
$67.10
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
Fits:
  • Mercedes-Benz:
    • 300 E,
    • 300 TE
MSRP $400.00
$283.20
MSRP $400.00
$283.20
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
Fits:
  • Mercedes-Benz:
    • 300 E,
    • 300 TE
MSRP $400.00
$283.20
MSRP $400.00
$283.20
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
$162.84
$162.84
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
$73.20
MSRP $100.00
$73.20
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
$82.96
$82.96
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
$211.22
MSRP $358.00
$211.22
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
$73.20
MSRP $120.00
$73.20
Side Rail
Part Number: 124-770-01-34
Positions: Left Front
Other Names: Rail, Folding Top More Names
Description: Hardware & components, front. More Info
Fits:
  • Mercedes-Benz:
    • 300 CE,
    • E 320
MSRP $110.00
$80.52
MSRP $110.00
$80.52
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
$62.22
MSRP $85.00
$62.22
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
$38.40
MSRP $50.00
$38.40
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
$129.80
MSRP $184.00
$129.80
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
$129.80
MSRP $184.00
$129.80
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
$444.60
$444.60
Side Rail
Part Number: 140-782-06-24
Positions: Right
Other Names: Rail, Rail, Sliding Roof More Names
Replaces: 126-782-12-24
Description: Panels, side. Frame & rails, side. Glass & components. 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 $73.00
$50.43
MSRP $73.00
$50.43
Side Rail
Part Number: 163-311-04-01
Positions: Left Rear
Other Names: Side Member More Names
Replaces: 163-311-03-01
Description: Rear. More Info
Fits:
  • Mercedes-Benz:
    • ML 320,
    • ML 350,
    • ML 430,
    • ML 500,
    • ML 55 AMG®
MSRP $625.00
$436.41
MSRP $625.00
$436.41
Side Rail
Part Number: 201-637-01-46
Positions: Left
Other Names: Roof Rail More Names
Fits:
  • Mercedes-Benz:
    • 190 D,
    • 190 E
MSRP $14.00
$10.75
MSRP $14.00
$10.75

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