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Details
| Specification | Value |
|---|---|
| Brand | OPTIMAL |
| MPN | f8-6161 |
| Fitting Position | Rear Axle |
| Fitting Position | Driver Side |
| Length [mm] | 37.8 mm |
| Inner Diameter [mm] | 12.1 mm |
| Outer Diameter [mm] | 41.5 mm |
OE/OEM numbers (2)
Search by this OE number to find compatible parts
- MERCEDES-BENZ—2113520865
- MERCEDES-BENZ—A2113520865
Where this part fits
Original-fit position for OE 2113520865. The red ring marks where this part installs on the vehicle.

About this product
When mounting axle strut performance matters, the OPTIMAL F8-6161 delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: Fitting Position: Rear Axle, Fitting Position: FB, Length [mm]: 37, Carbon mm, Inner Diameter [mm]: Zinc, Steel mm, Outer Diameter [mm]: 41, Rubber mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Compatible with MERCEDES-BENZ vehicles; use the vehicle selector above to confirm exact fitment for your make, model, and engine variant. Fitment data is sourced from TecDoc, the authoritative European parts catalogue. This part supersedes original equipment references: 014 035 0084, 046448B, 10 92 2141, 2113520865 and 10 more. Matching these numbers confirms a like-for-like replacement with no loss of function. OPTIMAL is a recognised supplier of automotive replacement components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
About OPTIMAL
OPTIMAL, founded in Germany, is a well-regarded aftermarket brand specialising in steering, suspension, and wheel bearing components. OPTIMAL produces ball joints, tie rod ends, control arm bushings, wheel bearings, and stabiliser links for European, Asian, and American vehicle applications. Manufactured to stringent quality standards with comprehensive testing protocols, OPTIMAL parts deliver OE-matching fit and performance. Known for excellent value and wide vehicle coverage, OPTIMAL is a popular choice among professional workshops across Europe.
Suitable cars
Equivalent products (12)
Mounting Axle Strut OPTIMAL F8-6161 — compatible car models
| Car models | MERCEDES-BENZ: CLS (C219), E-CLASS T-Model (S211), E-CLASS (W211), SL (R230) |
|---|---|
| Engines | CLS 55 AMG (219.376); E 55 T AMG Kompressor (211.276); E 200 CDI (211.004); 55 AMG (230.472) |
| Year of manufacture | 2001-2012 |
| Manufacturer article number (MPN) | F8-6161 |
| OE part numbers | 2113520865, A2113520865 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
OPTIMAL f8-6161 . Fitting Position: FB. Fitting Position: HA. Inner Diameter [mm]: 12,1 mm. Length [mm]: 37,8 mm. Outer Diameter [mm]: 41,5 mm
- 1x Mounting Axle Strut
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Express and standard shipping available.
- Standard delivery: 2-5 business days
- Express delivery: 1-2 business days
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Mounting Axle Strut compatible with my car?
This Mounting Axle Strut fits MERCEDES-BENZ vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this OPTIMAL Mounting Axle Strut have?
This OPTIMAL Mounting Axle Strut has the following specifications: Fitting Position: HA; Fitting Position: FB; Length [mm]: 37,8 mm; Inner Diameter [mm]: 12,1 mm; Outer Diameter [mm]: 41,5 mm. Check the full specifications table above for complete details.
What OE part numbers does this Mounting Axle Strut replace?
This Mounting Axle Strut replaces OE part numbers: 2113520865, A2113520865. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Mounting Axle Strut cost?
This OPTIMAL Mounting Axle Strut is available for £9.99. Mounting Axle Strut prices vary depending on brand, specifications, and vehicle compatibility. OPTIMAL parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Mounting Axle Strut?
Regular inspection of your Mounting Axle Strut is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a Mounting Axle Strut?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the Mounting Axle Strut fitted by a professional mechanic.
Can I use this part as a replacement for OE 2113520865?
Yes, this OPTIMAL Mounting Axle Strut is a direct replacement for OE part number 2113520865. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
