Mercedes-AMG M139 Engine
Used & Reconditioned for Sale
M139l, M139.980, AMG 2.0T, 45 S engine, AMG 45 S
1,991cc
Displacement
Petrol
Fuel
2019–present
Production
Fits Mercedes-AMG A45 S, CLA45 S, GLA45 S, C63 S E Performance and SL 43 models — also known as M139l, AMG 2.0T, 45 S engine. Verified fitment, fixed prices, UK delivery.
Displacement
Fuel
Production
Configuration
Applications
Verified Fitment
Checked by registration
12-Month Warranty
On reconditioned units
UK Nationwide Delivery
2-4 working days
14-Day Returns
Uninstalled, full refund
Buy an M139 Engine for Your Vehicle
The Mercedes-AMG M139 is the world's most powerful production four-cylinder engine, hand-built in Affalterbach. Available in 2 distinct application groups — transverse '45 S' and longitudinal M139l — each configured and priced for its specific vehicle fitment.
M139 Transverse (45 S)
Fits A45 S W177, CLA45 S C118, GLA45 S H247
£5,495
Coming soonM139l Longitudinal (C63 / SL 43\)
Fits C63 S E Performance, C43, SL 43 (2022+)
£9,495
Coming soonFull M139 Compatibility
The M139/M139l 2.0-litre AMG turbo engine is fitted transversely to A45 S, CLA45 S and GLA45 S, and longitudinally to C63 S E Performance, C43 and SL 43 from 2019. Every row below links to its specific unit page, and compatibility can be confirmed instantly using our registration checker.
| Model | Chassis | Variants | Years | Config. | Unit page |
|---|
Confirm your exact specification with the registration checker above.
M139 Engine Prices
The M139 is available as both used and reconditioned units for the transverse '45 S' applications, while the longitudinal M139l is offered primarily as reconditioned due to extremely thin used supply. Pricing reflects the complexity and high performance of these hand-built AMG engines.
| Application | Used from | Reconditioned from |
|---|---|---|
| M139 Transverse (45 S) | £5,495 | £7,295 |
| M139l Longitudinal (C63 / SL 43\) | — | £9,495 |
Prices shown are current lowest listed prices and update as stock changes. The price on each listing is the price you pay — no hidden fees at checkout.
What You Get with a M139 Engine
What You Get with a M139 Engine
What's included
Not included
Used or reconditioned?
Given the M139's extreme performance envelope and the fact that most host vehicles are still within their manufacturer warranty period, used supply is exceptionally thin and largely restricted to crash-damaged donors. Reconditioned or specialist-prepared units are the recommended and most dependable route for both transverse '45 S' and longitudinal M139l applications. The M139 is the most powerful production four-cylinder engine in the world, hand-built by Mercedes-AMG in Affalterbach, but its extreme specific output and complex turbocharging systems (including the electric exhaust-gas turbo on longitudinal models) place immense stress on internal components. Every unit we supply is compression-tested, inspected for NANOSLIDE cylinder bore integrity, and — where fitted — checked for correct electric turbo operation as standard before dispatch.
M139 Engine Buying FAQs
Answers to common fitment, condition, warranty and delivery questions.
A:A-Class W177, CLA C118, GLA H247 (as "45 S"), plus C-Class W206 (C43, C63 S E Performance) and SL R232 (SL 43), 2019–present.
A:M139 (transverse, mechanical twin-scroll turbo) and M139l (longitudinal, electric exhaust-gas turbo with 48V ISG); both share the 1,991cc core architecture but are NOT mechanically interchangeable. Aliases include "AMG 2.0T", "45 S engine" and M139.980.
A:Given the M139's extreme performance envelope and the fact that most host vehicles are still within their manufacturer warranty period, used supply is exceptionally thin and largely restricted to crash-damaged donors. Reconditioned or specialist-prepared units are the recommended and most dependable route for both transverse '45 S' and longitudinal M139l applications.
A:Use the registration checker on each listing page, cross-reference your V5C chassis code and confirm the engine code stamp (M139) matches. Note the critical difference between transverse "45 S" and longitudinal M139l applications — order the correct group.
A:12 month warranty on recon units, UK nationwide palletised delivery, free compatibility check before purchase.
Find Your M139 Engine by Registration
Enter your vehicle registration to confirm exact fitment and see available units for your specific chassis. All prices are fixed — no hidden fees.