No product images available
Specs, fitment data and pricing remain accurate.- Shop with confidence: competitive prices, exclusive deals, and delivery perks.
- Need it quickly? We dispatch fast-moving parts daily. Check delivery options.
- Swap or return items within the standard return period with a simple process.
- Questions about fitment or orders? Our support team is ready to help.
Similar products
Customers also bought
Details
| Specification | Value |
|---|---|
| Brand | MERTZ |
| MPN | m-s5263 |
| Fitting Position | Rear |
OE numbers (6)
Search by this OE number to find compatible parts
- AUDI / SEAT—8E0 399 105 CA
- AUDI—8E0 399 105 CF
- AUDI / SEAT—8E0 399 105 EC
- AUDI—8E0 399 105 EF
- AUDI / SEAT—8E0 399 105 HQ
- AUDI—8E0 399 105 HS
Where this part fits
Original-fit position for OE 8E0399105CF. The red ring marks where this part installs on the vehicle.
About this product
When mounting automatic transmission performance matters, the MERTZ M-S5263 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, Mounting Type: Cast Iron. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Compatible with AUDI, SEAT 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: 001-10-29140, 34145, 387 849, 40-0726 and 8 more. Matching these numbers confirms a like-for-like replacement with no loss of function. MERTZ 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 with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
Suitable cars
Equivalent products (6)
Mounting Automatic Transmission MERTZ M-S5263 — compatible car models
| Car models | AUDI: A4 B6 (8E2), A4 B6 Avant (8E5), A4 B6 Convertible (8H7), A4 B7 (8EC), A4 B7 Avant (8ED); SEAT: EXEO (3R2), EXEO ST (3R5) |
|---|---|
| Engines | 2.5 TDI; 1.8 T quattro; 1.6 |
| Year of manufacture | 2000-2013 |
| Manufacturer article number (MPN) | M-S5263 |
| OE part numbers | 8E0 399 105 CA, 8E0 399 105 CF, 8E0 399 105 EC, 8E0 399 105 EF, 8E0 399 105 HQ, 8E0 399 105 HS |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
MERTZ m-s5263 . Fitting Position: H. Mounting Type: 3
- 1x Mounting Automatic Transmission
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 business days
- Order before 5pm — ships the next working day
- 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 Automatic Transmission compatible with my car?
This Mounting Automatic Transmission fits AUDI, SEAT 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 MERTZ Mounting Automatic Transmission have?
This MERTZ Mounting Automatic Transmission has the following specifications: Fitting Position: H; Mounting Type: 3. Check the full specifications table above for complete details.
What OE part numbers does this Mounting Automatic Transmission replace?
This Mounting Automatic Transmission replaces OE part numbers: 8E0 399 105 CA, 8E0 399 105 CF, 8E0 399 105 EC, 8E0 399 105 EF, 8E0 399 105 HQ, 8E0 399 105 HS. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Mounting Automatic Transmission cost?
This MERTZ Mounting Automatic Transmission is available for £17.99. Mounting Automatic Transmission prices vary depending on brand, specifications, and vehicle compatibility. MERTZ 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 Automatic Transmission?
Regular inspection of your Mounting Automatic Transmission 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 Automatic Transmission?
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 Automatic Transmission fitted by a professional mechanic.
Can I use this part as a replacement for OE 8E0 399 105 CA?
Yes, this MERTZ Mounting Automatic Transmission is a direct replacement for OE part number 8E0 399 105 CA. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
