Enter any Mercedes engine code and get instant used, reconditioned and rebuilt supply values drawn from real UK quote data — no account, no email, no obligation.
The Mercedes engine value checker is a free online tool that tells you what any Mercedes engine is currently worth on the UK supply market — instantly and without an email address.
Enter your engine code below to start — or use our registration lookup if you don't know the code yet.
Select or type your engine code — OM651, OM642 and OM654 cover most C-Class, E-Class, GLC and GLA diesels on UK roads, while M276 and M177 cover the six-cylinder petrols and AMG V8s. Not sure which engine you have? Our engine code decoder explains the naming system, and the engine number location guide shows you where to find the stamp on the block.
Next steps: read the full engine guide, then compare fitted quotes from vetted specialists.
Demo tool — five engines from our 2025 dataset are shown as samples, with values tagged [EM-QUOTE] and enquiry volumes [EM-VERIFIED]. The production version integrates live supplier pricing across the full Mercedes range.
Use the full fitment matrix or the engine code guide to confirm the code, then check back — or request quotes directly and let specialists price your exact unit.
No account, no email required to see your result. If you only know the registration, our registration lookup will identify the engine for you first.
Your code is cross-referenced with supplier pricing gathered from 24,650 UK quote requests in 2025 [EM-VERIFIED], so the figures reflect what engines actually transact for, not list prices.
Three condition tiers with supply-only values, the labour hours to budget for removal and refit, and a route to a quote if you want one. From there, the engine compatibility checker confirms which donor units will physically fit your chassis.
This is one of eight free tools on the site — the repair vs replace calculator is the natural next stop once you know your engine's value.
Supply value is not fitted cost. Every figure this tool returns is supply-only — the price of the engine itself, delivered. Fitting adds removal and refit labour, which runs 8–12 hours for the four-cylinder OM651 and OM654 and 10–16 hours for the V6 and V8 units [EM-QUOTE]. At the £65/hr independent baseline used in our data (North England/Midlands), with London and the South East adding 40–60% [EM-QUOTE], that labour component is often a third of the total bill. Our supply and fit explainer breaks the two apart in full.
The three condition tiers answer different questions. A used engine is the cheapest route but carries unknown history; a reconditioned unit has been stripped, inspected and rebuilt to a standard; a rebuilt engine is the most thorough and the most expensive. Which makes sense for your car depends on the vehicle's value — our condition comparison guide sets out the trade-offs.
Value is only half the decision. What matters is the repair cost measured against your car's worth. For Mercedes we apply a 70% repair-to-value threshold: once the cheapest viable replacement approaches 70% of the vehicle's market value, scrapping or part-exchanging deserves serious consideration. The full logic, with worked examples, lives in our repair, replace or scrap framework, and engine-by-engine figures are listed in the replacement cost by engine code table.
Supply values behind this tool are drawn from actual supplier quotes sent through our platform and cross-checked against marketplace listings [EM-QUOTE]. Enquiry volumes come from the same 24,650-request, January–December 2025 dataset that powers every data page on this site [EM-VERIFIED] — the OM651 alone generated 1,250 requests, making it the most enquired-about Mercedes engine of the year [EM-VERIFIED]. Full methodology and our verification process are published on the data verification and methodology pages, and the same figures feed our average replacement cost report.
The demo currently shows the five highest-volume Mercedes engines. Where a code isn't yet covered, we say so plainly rather than guessing — a made-up value would be worse than no value at all.
Yes — completely free, and no email address is required to see your result. Email capture, where offered, only ever appears after your result has been shown, never as a gate.
The ranges come from real supplier quotes routed through our platform in 2025, cross-checked against marketplace listings [EM-QUOTE]. They are bands, not fixed prices: condition, mileage, warranty and regional availability all move the final figure, so treat the midpoint as a realistic expectation and confirm with quotes.
This tool tells you what an engine is worth on the supply market. The repair vs replace calculator takes that value, adds labour, and weighs the total against your specific vehicle's worth using the 70% Mercedes threshold. Most owners use this tool first, then the calculator.
Confirm the code using the engine code guide or the physical stamp on the block, then check back — coverage expands regularly. For older OM646 or OM651-era units, the OM651 knowledge centre and its siblings cover the full family history and fitment.
Whatever your engine turns out to be worth, compare fitted quotes from our vetted specialist network — supply values are only the starting point.
Compare Quotes Now Repair vs Replace Calculator