Mercedes Garage
Mercedes-Benz Engine Replacement & Fitting
Professional engine replacement service for all Mercedes-Benz models. Complete removal, fitting, and programming with manufacturer-grade tools.
15+ yrs
Mercedes specialists
1,800+
engines rebuilt
12 mo
unlimited-mileage warranty
What This Service Involves
Our engine replacement service covers the complete removal of your vehicle's existing engine and the fitting of a professionally prepared replacement unit. We handle every step in-house at our Billericay workshop:
- Full vehicle inspection and system check prior to work
- Safe removal of the old engine using specialised lifting equipment
- Thorough cleaning and preparation of the engine bay
- Transfer of all ancillary components (alternator, pumps, sensors, wiring)
- Precise installation of the replacement engine with manufacturer-specified torque settings
- Reconnection of cooling, fuel, exhaust, and electrical systems
- Fluid filling and system bleeding (oil, coolant, transmission fluid where required)
- ECU programming and adaptation using Xentry diagnostic system – including 48V mild-hybrid and V12 M275 engines
- Comprehensive road testing and final quality control
We use genuine Mercedes-Benz service data and tooling to ensure full compatibility and performance. For modern 48V systems, we follow strict high-voltage safety protocols. For V12 engines, we apply specialised timing and torque procedures.
Pricing & Quotation
Our engine replacement costs are quoted per vehicle based on the specific engine type and condition. As a guide, our engine rebuild starting prices are listed below – replacement pricing includes the cost of the replacement unit and is provided as a fixed quote after inspection.
Pricing disclaimer – actual replacement costs vary; contact us for a personalised quote.
Inside our workshop
Mercedes-Benz Engine Replacement & Fitting
Applicable Mercedes-Benz Models
We replace engines across the entire Mercedes-Benz range, from compact A-Class to the G-Class, S-Class, and AMG models. Below are some of the most common model families we support:
For specific variants, see:
Not sure if your model is covered? Contact us for confirmation.
Our Step-by-Step Engine Replacement Process
- 01
We inspect your vehicle to confirm the engine specification and document all connections.
- 02
Drain fluids, disconnect ancillaries, and carefully remove the old engine using a hoist.
- 03
Transfer required components, install new seals and gaskets, and verify compatibility.
- 04
Lower the replacement engine into place, secure mounts, and reconnect all systems.
- 05
Fill with correct fluids and perform ECU adaptation using Xentry diagnostic tools.
- 06
Conduct thorough leak checks, road testing, and final quality control before collection.
Why Choose Mercedes Garage
- 12-month, unlimited-mileage warranty on all engine replacement work
- Nationwide recovery from £70 – most vehicles collected within hours
- Under-30-minute quote during working hours after initial contact
- Manufacturer-grade diagnostics – Xentry and Vediamo for full ECU programming
- 48V and V12 expertise – we handle all Mercedes engine systems
- 3–5 working day turnaround for rebuilds; replacement times quoted per job
- Established since 2009 – trusted by Mercedes owners across the UK
How to Get Your Engine Replaced
- 01
Call, email, or use our online form to describe your vehicle and requirement.
- 02
We'll provide a fixed-price quote within 30 minutes during working hours.
- 03
We can recover your vehicle nationwide, or you can deliver to our workshop.
- 04
We carry out the work and test thoroughly before handover.
- 05
Collect your Mercedes with a 12-month warranty on the work.
Related Services
Explore other Mercedes engine services we offer:
Frequently Asked Questions
What does a Mercedes-Benz engine replacement involve?+
The process includes vehicle inspection, removal of the old engine, preparation of the replacement unit, installation, connection of all ancillaries, fluid fills, ECU programming with Xentry, and final road testing.
How long does an engine replacement take?+
Most Mercedes engine replacements are completed within 2 working days, depending on the model and complexity. We prioritise efficient turnaround while ensuring thorough quality checks.
What warranty do you offer on an engine replacement?+
All our engine replacement work comes with a 12-month, unlimited-mileage warranty covering parts and labour.
Do you handle 48V mild-hybrid and V12 engines?+
Yes. We are fully equipped to replace engines from all Mercedes model lines, including 48V MHEV systems and the complex V12 M275, using manufacturer-level diagnostic tools and safety protocols.
Do I need to bring the car to you, or do you offer collection?+
We offer nationwide recovery from £70, with most vehicles collected within a few hours of booking. We also accept vehicles delivered to our Billericay workshop.