Strut Bump Stop 2043210006: Front Suspension Buffer for Mercedes C-Class W204 and E-Class W212 W207

Mercedes-Benz C-Class and E-Class models built between 2008 and 2017 share one front suspension detail that decides whether a shock absorber survives a pothole: the elastic buffer fitted on the piston rod of each front strut. Part number 2043210006, written as A 204 321 00 06 in the Mercedes-Benz system, is that buffer for a defined group of W204, W212 and C207 vehicles. Bonpora produces it as item 4110191 in polyurethane and ships it to parts wholesalers and importers worldwide in neutral export packaging.

This guide covers the exact vehicle applications of 2043210006, the suspension codes that decide fitment on the data card, the aftermarket cross-reference numbers, and the wholesale and OEM terms available for bulk orders.

What Is Strut Bump Stop 2043210006?

The 2043210006 buffer is a moulded polyurethane sleeve that slides over the piston rod of the front shock absorber, between the top of the dust cover and the strut mount. Dealer catalogues list it under the names Stop Buffer, Suspension Strut Bumper and Bumper; Chinese repair shops usually call it the front shock absorber buffer. Its job is progressive: during the final travel of the suspension, the material compresses and absorbs the energy that would otherwise hit the strut mount and the top mount bearing.

The part is listed for the front axle, left and right, one buffer per corner. Two buffers are fitted per car and aftermarket prices are quoted per piece, so wholesale buyers should plan orders in pairs. Failure symptoms are easy to recognise: a heavy knock over sharp bumps, a front end that sits lower after winter, or a torn dust cover full of dirt found at inspection.

Vehicle Applications: C-Class W204 and E-Class W212 / C207

Dealer and independent catalogues converge on the same application list. The buffer covers the front axle of the C-Class W204 sedan and the C204 coupe, and the front axle of the E-Class W212 sedan together with the C207 coupe and A207 convertible.

Some United States catalogues also list the E63 AMG saloon for 2010 to 2011. Because AMG variants carry dedicated suspension hardware, treat that line as a catalogue reference only and confirm the application against the VIN before quoting a customer.

Suspension Codes Decide the Fitment: 483 and 486 versus P84

The single most common cause of a wrong order on this number is not the model year but the suspension code on the data card. Independent catalogues describe 2043210006 as the buffer for cars with the vehicle dynamics package or sport suspension, data card codes 483 and 486, and explicitly note that it does not fit cars with the AMG performance suspension, code P84. The same C250 can therefore need two different buffers depending on the equipment line the first owner ordered.

For trade customers this is also a sales opportunity: listing the codes in your own offer, the way this article does, reduces returns and builds trust with workshops that have already received a wrong delivery once.

Technical Specifications of Bonpora 4110191

Bonpora moulds the buffer in polyurethane to the original geometry. Catalogues measure the height slightly differently: Febi lists 73 mm, while the production drawing of item 4110191 gives 74.8 mm. The difference comes from the chamfer at the top end and does not affect the fit.

Cross-Reference Numbers for 2043210006

Sourcing by cross number is standard practice in the aftermarket. The table below lists the numbers that major trade platforms connect to this buffer.

Chinese trade platforms additionally list alternatives from Sachs, Boge, OSSCA and other brands for W204, W212 and W207 workshops. Whatever brand you stock, compare the height and the inner diameters before mixing suppliers inside one delivery.

Buffer Only or Protection Kit: The S1 Service Number

Mercedes-Benz sells the buffer in two commercial forms. The base number 204 321 00 06 covers the buffer alone, while the service number 204 321 00 06 S1 stands for the combined set of buffer and protective cap, and it replaced the earlier kit number 204 323 02 92 S1. Febi mirrors this structure: the buffer alone carries number 38574, and kit 108832 contains two buffers 38574 plus two protective caps 108831.

For a wholesale programme this distinction matters. Workshops that open the front strut for a buffer replacement almost always find a fatigued dust cover as well, because a cracked cover lets water and grit attack the new buffer within one season. Stocking the buffer together with dust covers lets your customers quote a complete front strut service instead of a single part.

Why Polyurethane Instead of Rubber

The original buffer is a rubber compound; the Bonpora version uses polyurethane. For the buyer the practical differences are limited but real: polyurethane resists ozone and engine bay chemicals better, shows lower compression set after repeated full compression, and keeps its shape in cold storage and hot climates alike. Polyurethane does not make the suspension harder on its own; the ride behaviour depends on the height and the density, and item 4110191 follows the original geometry. Distributors who already carry shock absorber parts in rubber can add the polyurethane line as an upsell for customers in hot and coastal markets.

Wholesale and OEM Terms from Bonpora

Bonpora supplies item 4110191 under neutral export packaging with a one year warranty and a delivery window of 15 to 30 days. Orders can be mixed with other strut bumpers, mounting bushes and suspension components inside one container. For distributors with their own brand, the factory supports OEM and custom design work: hardness, colour, printing and packaging are configured to the market requirements, from small pilot batches to repeat container orders. Details of the custom programme are collected on the custom parts page.

Pre-Order Checklist for Trade Buyers

Before confirming a purchase order for 2043210006, run through five points:

• Read the VIN data card and confirm the suspension code: 483 or 486 fits, P84 does not.
• Confirm the axle: this number is front axle only, left and right.
• Decide between the single buffer and the S1 protection kit with dust cover.
• Check the height on the removed part, expected around 73 to 74.8 mm.
• Agree the quantity in pairs, two buffers per car.

Frequently Asked Questions

Which Mercedes models does strut bump stop 2043210006 fit?

It fits the front axle of the C-Class W204 sedan and C204 coupe from 2008 to 2015, and the E-Class W212 sedan, C207 coupe and A207 convertible from 2010 to 2017, on cars with data card codes 483 or 486. Always confirm the exact vehicle by VIN before shipping.

How do I avoid ordering the wrong version?

Check three things on the data card: the suspension code, where 483 and 486 fit and P84 does not; the axle, which is front only; and the height of the removed buffer, around 73 to 74.8 mm. If a customer reports a repeated wrong delivery, ask for a photo of the data card suspension lines.

What is the difference between 2043210006 and 204 321 00 06 S1?

The plain number is the buffer alone. The S1 number is the service kit of buffer plus protective cap, and it superseded the older kit number 204 323 02 92 S1. In the aftermarket, Febi 38574 matches the single buffer and Febi 108832 matches the kit.

What are the minimum order and delivery terms?

Bonpora quotes item 4110191 with a one year warranty, neutral export packaging and 15 to 30 days production and delivery. Mixed orders with other suspension parts are welcome, and OEM branding is available for distributors who sell under their own label.

Request a Quote for Strut Bump Stop 2043210006

Send the OE number 2043210006 or the Bonpora number 4110191 with your target quantity, and the sales team will reply with the current price, packing plan and shipping schedule. Sample orders for quality approval are supported before container quantities.