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.

Inside Step Rail
Part Number: 211-680-50-35-9B51
Options: Right Front, Right Inner
Other Names: Rail More Names
Replaces: 211-680-18-35-9B51
Description: Sedan, front, inner. More Info
$31.85
$31.85
Inside Step Rail
Part Number: 211-680-51-35-9B51
Options: Left Front, Left Inner
Other Names: Rail More Names
Replaces: 211-680-17-35-9B51
Description: Sedan, front, inner. More Info
$33.80
$33.80
Inside Step Rail
Part Number: 211-680-53-35-9B51
Options: Left Rear, Left Inner
Other Names: Rail More Names
Replaces: 211-680-05-35-9B51
Description: Sedan, rear, inner. More Info
$29.25
$29.25
Side Rail
Part Number: 4536100701
Options: Right
Other Names: Longitudinal Member More Names
MSRP $280.00
$252.00
MSRP $280.00
$252.00
Side Rail
Part Number: 4633111900
Options: Left Inner
Other Names: Longitudinal Member More Names
Description: Inner. More Info
Notes: Included with frame assembly. More Notes
$1,380.40
$1,380.40
Side Rail
Part Number: 4633112000
Options: Right Inner
Other Names: Longitudinal Member More Names
Description: Inner. More Info
Notes: Included with frame assembly. More Notes
$1,499.40
$1,499.40
Side Rail
Part Number: 201-637-01-46
Options: Left
Other Names: Roof Rail More Names
MSRP $14.00
$10.92
MSRP $14.00
$10.92
Side Rail
Part Number: 202-620-15-34
Options: Left
Other Names: Support, Front Panel, Metl More Names
Notes: Included with the front inner structure. More Notes
MSRP $520.00
$373.20
MSRP $520.00
$373.20
Side Rail
Part Number: 203-610-03-10
Options: Left
Other Names: Floor Side Rail, Side Member More Names
Description: Sedan, wagon,. Coupe/convertible, convertible. More Info
$176.08
$176.08
Side Rail
Part Number: 203-630-01-35
Options: Left Outer
Other Names: Roof Rail More Names
Description: Sedan, wagon, wagon, outer. More Info
$348.44
$348.44
Side Rail
Part Number: 203-636-04-46
Options: 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
$42.57
$42.57
Side Rail
Part Number: 203-637-14-47
Options: Right Outer
Other Names: Roof Rail More Names
Description: Sedan, wagon, wagon, outer assembly. More Info
$382.80
$382.80
Side Rail
Part Number: 204-620-45-34
Options: Left Inner, Front Left 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
$220.72
$220.72
Side Rail
Part Number: 209-780-06-61
Options: Right
Other Names: Mounting Rail More Names
Description: Coupe/convertible, coupe. More Info
MSRP $32.00
$24.70
MSRP $32.00
$24.70
Side Rail
Part Number: 123-782-01-24
Options: Left
Other Names: Rail, Rail, Sliding Roof More Names
Description: Panel & frame. More Info
MSRP $164.00
$124.46
MSRP $164.00
$124.46
Side Rail
Part Number: 123-840-00-14
Options: Right
Other Names: Bracket, Roof, Metal More Names
MSRP $92.00
$69.85
MSRP $92.00
$69.85
Side Rail
Part Number: 124-620-21-34
Options: 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
MSRP $400.00
$297.60
MSRP $400.00
$297.60
Side Rail
Part Number: 124-620-22-34
Options: 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
MSRP $400.00
$297.60
MSRP $400.00
$297.60
Side Rail
Part Number: 124-630-02-35
Options: Right Front, Right Inner
Other Names: Roof Rail More Names
Description: Front, inner. More Info
$171.12
$171.12
Side Rail
Part Number: 124-637-07-46
Options: Left Inner
Other Names: Roof Rail More Names
Description: Coupe, inner. More Info
MSRP $100.00
$76.20
MSRP $100.00
$76.20
Side Rail
Part Number: 124-637-08-46
Options: Right Inner
Other Names: Roof Rail More Names
Description: Coupe, inner. More Info
$86.36
$86.36
Side Rail
Part Number: 124-637-09-09
Options: Left Rear, Left Outer
Other Names: Panel, Roof More Names
Description: Rear, outer. More Info
MSRP $358.00
$221.96
MSRP $358.00
$221.96
Side Rail
Part Number: 124-637-17-09
Options: Left Outer
Other Names: Panel, Roof More Names
Description: Coupe, outer. More Info
MSRP $120.00
$76.20
MSRP $120.00
$76.20
Side Rail
Part Number: 126-637-06-46
Options: Right Inner
Other Names: Rail, Roof Rail More Names
Description: Side, inner. More Info
MSRP $85.00
$64.77
MSRP $85.00
$64.77
Side Rail
Part Number: 129-692-02-00-9051
Options: Right
Other Names: Paneling More Names
MSRP $50.00
$39.00
MSRP $50.00
$39.00
Side Rail
Part Number: 140-637-05-47
Options: Left Outer
Other Names: Roof Rail More Names
Description: Outer. More Info
MSRP $184.00
$136.40
MSRP $184.00
$136.40
Side Rail
Part Number: 140-637-06-47
Options: Right Outer
Other Names: Roof Rail More Names
Description: Outer. More Info
MSRP $184.00
$136.40
MSRP $184.00
$136.40
Side Rail
Part Number: 140-637-13-47
Options: Left
Other Names: Roof Rail More Names
Description: 400sel, s420, 500sel, s500, 600sel, s600, s320. More Info
$456.00
$456.00
Side Rail
Part Number: 211-840-10-24
Options: Right
Other Names: Roof Luggage Carrier Side Rail, Support More Names
Description: Wagon. More Info
$654.50
$654.50
Side Rail
Part Number: 215-919-23-20-8G69
Options: Left
Other Names: Seat Track Cover, Covering More Names
Description: Quartz. More Info
Notes: Order by color. More Notes
MSRP $26.00
$20.15
MSRP $26.00
$20.15
Side Rail
Part Number: 215-919-24-20-9B51
Options: Right
Other Names: Seat Track Cover, Covering More Names
Description: Anthracite. More Info
Notes: Order by color. More Notes
MSRP $25.00
$19.50
MSRP $25.00
$19.50
Side Rail
Part Number: 222-885-00-21
Options: Left
Other Names: Rail, Mounting Rail More Names
Description: Without amg line, bumper cover & components. Bumper cover & components, without amg pkg. Sedan, s63, s65, bumper cover & components.... More Info
Notes: Included with side mount. More Notes
$8.84
$8.84
Side Rail
Part Number: 230-620-28-34
Options: Right
Other Names: Support More Names
$445.20
$445.20
Side Rail
Part Number: 2476111700
Options: Left, Right
Other Names: Longitudinal Member More Names
$229.40
$229.40
Side Rail
Part Number: 4633112200
Options: Right Outer
Other Names: Longitudinal Member More Names
Description: Outer. More Info
Notes: Included with frame assembly. More Notes
$1,201.90
$1,201.90
Side Rail
Part Number: 201-620-27-34
Options: Left
Other Names: Support, Front End, Metal More Names
Notes: Included with the front inner structure. More Notes
MSRP $110.00
$83.82
MSRP $110.00
$83.82
Side Rail
Part Number: 201-637-02-46
Options: Right
Other Names: Roof Rail More Names
MSRP $14.00
$10.92
MSRP $14.00
$10.92
Side Rail
Part Number: 203-620-27-34
Options: Left
Other Names: Support More Names
Description: Coupe/convertible,. More Info
Notes: Included with apron assembly. More Notes
$200.88
$200.88
Side Rail
Part Number: 203-630-02-35
Options: Right Outer
Other Names: Roof Rail More Names
Description: Sedan, wagon, wagon, outer. More Info
$348.44
$348.44
Side Rail
Part Number: 203-636-01-21
Options: Left Inner, Left Front
Other Names: X More Names
Description: Sedan, wagon, sedan, inner, front. More Info
$49.67
$49.67
Side Rail
Part Number: 203-636-02-21
Options: Right Inner, Right Front
Other Names: X More Names
Description: Sedan, wagon, wagon, inner, front. More Info
$49.67
$49.67
Side Rail
Part Number: 203-636-02-46
Options: Right Inner, Right Rear
Other Names: Roof Rail More Names
Description: Sedan, wagon, sedan, inner, rear. More Info
$38.35
$38.35
Side Rail
Part Number: 203-636-03-46
Options: Left Inner, Left Rear, Left Rear Inner, Rear Left Inner Inner, Rear Left Inner Rear, Rear Left Inner Rear Inner
Other Names: Roof Side Rail, Roof Rail More Names
Description: Coupe, inner, rear. More Info
$42.57
$42.57
Side Rail
Part Number: 203-636-09-21
Options: Left Inner, Left Front, Left Front Inner, Front Left Inner Inner, Front Left Inner Front, Front Left Inner Front Inner
Other Names: Roof Side Rail, Roof Rail More Names
Description: Coupe, inner, front. More Info
$49.67
$49.67
Side Rail
Part Number: 203-637-12-47
Options: Right Outer
Other Names: Roof Rail More Names
Description: Sedan, wagon, sedan, outer assembly. More Info
$382.80
$382.80
Side Rail
Part Number: 203-637-13-47
Options: Left Outer
Other Names: Roof Rail More Names
Description: Sedan, wagon, wagon, outer assembly. More Info
$86.36
$86.36
Side Rail
Part Number: 204-784-05-09
Options: Left
Other Names: Side Cover, Sunroof Guide Rail, Left Paneling More Names
Description: 2010-15. Sedan, with panorama roof. More Info
Notes: Included with sunroof assembly. More Notes
$39.00
$39.00
Side Rail
Part Number: 205-610-01-23
Options: Left
Other Names: Longitudinal Member More Names
Description: Coupe, convertible, convertible. Sedan,. More Info
$164.92
$164.92
Side Rail
Part Number: 211-890-02-93
Options: Right
Other Names: Roof Luggage Carrier Side Rail, Roof Railing More Names
Description: Wagon. More Info
$321.16
$321.16
Side Rail
Part Number: 215-630-13-40
Options: Left, Front Left
Other Names: Fender Rail, Support More Names
Notes: Included with apron/rail assembly. More Notes
$123.19
$123.19

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