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In partnership with AXA™ InsuranceThere are hundreds of potential error codes, which only specialist diagnostic equipment can read. So when a warning light flashes on the dashboard, a diagnostics check is needed to assess how bad the problem is, and what may have caused it.
The warning light is just the beginning—it doesn’t give the whole picture. There are hundreds of parts in your engine, so the exact nature of the fault may not be immediately apparent.
Save up to 30% on your diagnostic inspection in Liverpool. See our table below to browse our honest, upfront prices.
Daniel, from London
Hey Fixter,
Terry, Fixter in-house mechanic expert
Free collection and delivery — anywhere
There are hundreds of potential error codes, which only specialist diagnostic equipment can read. So when a warning light flashes on the dashboard, a diagnostics check is needed to assess how bad the problem is, and what may have caused it.
The warning light is just the beginning—it doesn’t give the whole picture. There are hundreds of parts in your engine, so the exact nature of the fault may not be immediately apparent.
Save up to 30% on your diagnostic inspection in Liverpool. See our table below to browse our honest, upfront prices.
Daniel, from London
Hey Fixter,
Terry, Fixter in-house mechanic expert
Free collection and delivery — anywhere
| Car make and model | Dealers average price | exclusive price | Instant savings |
|---|---|---|---|
 Mercedes A150 Elegance Se 1.5 litres | £53.91 | £43.69 | 19% |
Mercedes A150 Classic Se 1.5 litres | £51.72 | £43.28 | 16% |
Mercedes 190e 2.3 litres | £63.26 | £50.65 | 20% |
Mercedes 123 Series Coupe 2.3 litres | £61.66 | £52.12 | 15% |
Mercedes 308d Lwb 2.3 litres | £63.36 | £51.14 | 19% |
Mercedes 124 Series Coupe 3 litres | £65.19 | £52.61 | 19% |
Mercedes A140 Elegance Auto 1.4 litres | £49.77 | £42.46 | 15% |
Mercedes 230ce Auto 3.7 litres | £62.02 | £52.12 | 16% |
Mercedes A140 Classic 1.4 litres | £54.37 | £44.10 | 19% |
Mercedes 250 2.5 litres | £63.55 | £54.09 | 15% |
Mercedes 123 Series Coupe 2.3 litres | £61.66 | £52.12 | 15% |
Mercedes 230ce Auto 3.7 litres | £62.02 | £52.12 | 16% |
Mercedes A140 Classic 1.4 litres | £54.37 | £44.10 | 19% |
Mercedes 250 2.5 litres | £63.55 | £54.09 | 15% |
Mercedes A150 Classic Se 1.5 litres | £51.72 | £43.28 | 16% |
* The cost of your diagnostic inspection depends on your car make and model and may vary depending on your location.
We personally select every local garage based on our unique 25-point criteria, which includes staff qualifications, equipment standards and customer ratings.
Fully qualified mechanics with 10+ years’ experience 👨🔧
Your car is in the UK’s safest expert hands.
Manufacturer-equivalent parts only ⚙️
Identical to your manufacturer’s, but much cheaper!
In-house experts approve all work personally 🔍
Every service carried out by our partner garages is fully reviewed.
12-month warranty on parts and labour 🛠
Any additional work needed will be carried out for free.
We personally select every local garage based on our unique 25-point criteria, which includes staff qualifications, equipment standards and customer ratings.
Fully qualified mechanics with 10+ years’ experience 👨🔧
Your car is in the UK’s safest expert hands.
Manufacturer-equivalent parts only ⚙️
Identical to your manufacturer’s, but much cheaper!
In-house experts approve all work personally 🔍
Every service carried out by our partner garages is fully reviewed.
12-month warranty on parts and labour 🛠
Any additional work needed will be carried out for free.
Modern cars have an onboard computer or Engine Control Unit (ECU). This continually assesses performance, with sensors throughout the car letting the ECU know of issues such as raised engine temperature, low fluid levels or problems with emission levels or the windscreen wipers. The ECU triggers an error once a problem has been found, and the relevant dashboard warning light will flash, but there are hundreds of potential error codes, which only specialist diagnostic equipment can read. So when a warning light flashes on the dashboard, a diagnostics check is needed to assess how bad the problem is, and what may have caused it.
Live data shows multiple readings from across the engine to assess whether everything is working as it should. The equipment can also check and rectify braking systems where there’s an electronic handbrake, and adjust headlights where possible. You don’t need to go to a dealership to get diagnostic testing done. Most garages and workshops will carry out diagnostic testing for nearly all models and types of vehicle.
We charge a fixed fee for diagnostic testing that can be done while you wait. This is usually done within an hour, but if further work is required, it will clearly take more time. Our highly-trained and qualified mechanics will give you a no-charge, no-obligation repair quote if testing highlights issues with the engine or anything else, and talk you in detail through what is needed to put things right.
So next time a dashboard warning light flashes on, don’t pay dealership prices for diagnostic testing. Let us manage it all for you, picking up your car for its testing, and ensuring a fair price and a reliable service.
The warning light is just the beginning—it doesn’t give the whole picture. There are hundreds of parts in your engine, so the exact nature of the fault may not be immediately apparent.
A diagnostic check accurately identifies the fault, avoiding more serious problems that could lead to costly repairs, potential safety hazards or worse damage. With these tests, your car is plugged into sophisticated diagnostic equipment which reads the error codes your car’s ECU has generated to explain the issue in full. Diagnostic checking looks for errors across various vehicle systems, including tyres, engine management, lights, emissions and more.
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