Step Rails

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Many Mercedes-Benz SUVs either come with or are compatible with step rails. They also get called side rails and running boards. Even performance vehicles have a variant: nerf bars, derived from the term "nerfing," meaning bumping into another racecar driver. Despite their several names, what step rails do is provide a stepping surface for getting into and out of your vehicle, versus a bare door sill.

If you know what they are already, then you probably already know that they mount mere inches from sills, and that you can install them lower than that to further simplify entry and exit. Doing so is especially advantageous if you're driving an SUV that's lifted. Running boards, on the other hand, mount close to your vehicle's rocker panels, if not flush with them. This improves their ground clearance. A running board also often has a flatter and wider profile, and its treads often span the length of the boards.

Upgrade your Mercedes-Benz | Install Genuine OEM Step Rails

Whatever type of rail you need, and whether for a replacement project or an upgrade, we've got the best solutions: genuine Mercedes-Benz. Step rails made by your OEM come guaranteed to fit your vehicle, after all. Order yours online today, right here at our auto parts store.

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®
$1,322.40
$1,322.40
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®
$1,447.80
$1,447.80
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
$426.65
$426.65
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
$285.60
MSRP $400.00
$285.60
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
$285.60
MSRP $400.00
$285.60
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
$164.22
$164.22
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
$213.01
MSRP $358.00
$213.01
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
$130.90
MSRP $184.00
$130.90
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
$130.90
MSRP $184.00
$130.90
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
$437.00
$437.00
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
$51.25
MSRP $73.00
$51.25
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
$428.95
MSRP $625.00
$428.95
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
Side Rail
Part Number: 202-620-15-34
Positions: Left
Other Names: Support, Front Panel, Metl More Names
Fits:
  • Mercedes-Benz:
    • C 220,
    • C 230,
    • C 280
MSRP $520.00
$357.65
MSRP $520.00
$357.65
Side Rail
Part Number: 203-610-03-10
Positions: Left
Other Names: Floor Side Rail, Side Member More Names
Description: Sedan, wagon,. Coupe/convertible, convertible. 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
$168.98
$168.98
Side Rail
Part Number: 203-630-01-35
Positions: Left Outer
Other Names: Roof Rail More Names
Description: Sedan, wagon, wagon, outer. More Info
Fits:
  • Mercedes-Benz:
    • C 240,
    • C 320
$334.39
$334.39
Side Rail
Part Number: 203-636-04-46
Positions: Right Inner, Right Rear, Right Rear Inner, Rear Right Inner Inner, Rear Right Inner Rear, Rear Right Inner Rear Inner
Other Names: Roof Side Rail, Roof Rail More Names
Description: Coupe, inner, rear. More Info
Fits:
  • Mercedes-Benz:
    • C 230,
    • C 320
$41.25
$41.25
Side Rail
Part Number: 203-637-14-47
Positions: Right Outer
Other Names: Roof Rail More Names
Description: Sedan, wagon, wagon, outer assembly. More Info
Fits:
  • Mercedes-Benz:
    • C 240,
    • C 320
$366.85
$366.85
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
$211.82
$211.82
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®
$627.00
$627.00
Side Rail
Part Number: 21591923208g69
Positions: Left
Other Names: Seat Track Cover, Covering More Names
Description: Quartz. 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: 215-919-24-20-9B51
Positions: Right
Other Names: Seat Track Cover, Covering More Names
Description: Anthracite. More Info
Fits:
  • Mercedes-Benz:
    • CL 500,
    • CL 55 AMG®,
    • CL 600,
    • CL 65 AMG®
MSRP $25.00
$19.20
MSRP $25.00
$19.20
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
$358.80
MSRP $520.00
$358.80
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
$55.63
MSRP $75.00
$55.63
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: 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
$333.20
$333.20
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
$164.22
$164.22
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
$208.25
$208.25
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
$366.85
$366.85
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®
$140.42
$140.42
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
$48.75
$48.75
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®
$423.20
$423.20
Side Rail
Part Number: 21591923201a26
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

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