Mercedes Garage
Mercedes-Benz High-Mileage Engine Rebuild
Dedicated rebuild service for engines that have covered substantial miles. We carry out a comprehensive strip-down, precision machining, and full parts replacement to bring your Mercedes engine back to its best.
15+ yrs
Mercedes specialists
1,800+
engines rebuilt
12 mo
unlimited-mileage warranty
What Makes a High-Mileage Rebuild Different
Engines with high mileage (typically 100,000+ miles) have experienced cumulative wear across multiple systems. A standard rebuild may not be sufficient; a high-mileage rebuild requires a more thorough approach.
- More comprehensive parts replacement — components that are still serviceable in a lower-mileage engine are often at end-of-life here and must be renewed.
- Stricter inspection criteria — all parts are checked against tighter tolerances because wear is more distributed and hidden damage is more likely.
- Higher machining demand — cylinder bores, crankshaft journals, and deck surfaces are more likely to be out of specification and require machining to restore geometry.
- Ancillary renewal — oil pumps, water pumps, and timing components are often replaced as a matter of course, even if they appear functional, because their service life is typically aligned with the engine's major overhaul interval.
We treat every high-mileage engine on its own merits, but our baseline standard is significantly more rigorous than a routine rebuild.
Starting Price for High-Mileage Rebuilds
Our high-mileage rebuilds start from the same base pricing as our standard rebuilds, but additional machining and parts replacement may increase the final cost. We quote after a full inspection.
Prices are indicative. Final cost depends on inspection findings. View pricing disclaimer →
Inside our workshop
Mercedes-Benz High-Mileage Engine Rebuild
Our High-Mileage Rebuild Process in Pictures
All images are staged on our premises using real workshop photography as the base. Actual completed job photography will replace these placeholders as they become available.
Our High-Mileage Rebuild Process
- 01
Full Disassembly & Cleaning
The engine is stripped to its bare components. All parts are thoroughly cleaned to allow accurate inspection.
- 02
Detailed Measurement
Critical dimensions — cylinder bores, crankshaft journals, camshaft bearing surfaces — are measured against OE wear limits.
- 03
Machining & Restoration
Bores are honed or bored, crankshafts are ground (if needed), and decks are skimmed to restore flatness.
- 04
Replacement of All Wear-Prone Parts
We install new bearings, pistons, rings, seals, gaskets, timing components, oil pump, and water pump as standard.
- 05
Reassembly & Testing
Precision assembly with new torque-to-yield fasteners, followed by a full test run to confirm oil pressure and compression.
- 06
Refit & Road Test
The engine is refitted, fluids filled, and the vehicle is road-tested to ensure everything performs as expected.
Why Choose Us for Your High-Mileage Rebuild
- 12-month unlimited-mileage warranty on all rebuilds — we stand behind our work.
- Established in 2009 — specialist Mercedes workshop with extensive experience on high-mileage engines.
- We use genuine OEM parts and follow factory specifications for machining and assembly.
- Nationwide recovery available from £70 — we can bring your car to us.
- Quote turnaround under 30 minutes during working hours.
- Rebuilds completed in 3-5 working days from arrival at our workshop (subject to parts availability).
- Full machine shop on-site — we handle all machining in-house, ensuring quality control at every step.
Recent High-Mileage Rebuilds
Real completed jobs will be shown here once photography is available. These are staged representations on our premises.
How It Works
- 01
Contact Us
Call, email, or fill in our quote form. We'll ask for your vehicle details and arrange an inspection.
- 02
Vehicle Inspection
We inspect your engine, take measurements, and give you a fixed-price quote tailored to your high-mileage engine.
- 03
Work Commences
Once you approve the quote, we schedule your rebuild and keep you updated throughout.
- 04
Collection & Warranty
We test your vehicle, hand it back to you, and provide a 12-month unlimited-mileage warranty.
Frequently Asked Questions
What qualifies as "high-mileage" for a Mercedes engine?+
We typically consider engines with 100,000+ miles as high-mileage, but the decision also depends on maintenance history, engine type, and usage. We assess each engine individually.
How does a high-mileage rebuild differ from a standard rebuild?+
It involves more extensive parts replacement (including ancillaries like oil pumps), stricter inspection criteria, and higher likelihood of machining (cylinder bores, crankshaft journals).
Will my high-mileage engine be as good as new after rebuild?+
With proper machining, new OEM parts, and careful assembly, a high-mileage engine can perform and last as well as a new engine, provided the block is in good condition.
How long does a high-mileage rebuild take?+
Typically 3-5 working days from arrival at our workshop, though additional machining or parts lead times may extend this slightly.
What warranty do you offer on high-mileage rebuilds?+
We provide a 12-month unlimited-mileage warranty on all rebuilds, covering parts and labour.