Dyno Developed Software & Unrivalled
Technical Support.


An ECU Remap for your exotic car
can significantly improve your driving


ECU Remapping your Turbo Diesel has
never been so easy. With improved power
and fuel economy one simple step away.


Tuning your truck can improve your pulling
power and fuel economy. See how Celtic
Tuning can help you and your fleet.


Towing power is essential for any
farmer. Improve the power and
fuel economy of your tractor with
an ECU Remap.


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Testimonial Mercedes Benz Reviews

Wish I’d done it sooner

Check Mercedes Benz E Class stats

Mercedes Benz E Class E350 CDI BlueEFF 227 bhp Diesel

Posted on 27th November 2019, 10:37

Had my ‘59 plate Mercedes E350cdi for about 5 years now and after a couple of years started researching tuning options knowing there were performance and efficiency gains to be had on such a diesel. A great car and was a bit anxious about reliability issues following a stage 1 tune as I’ve never had to do a thing on the car other than usual consumable items, pads, discs, wipers, tyres etc. The car is pretty much bulletproof and good for at least another 150k that it currently has on the odometer.

Lovely guy came out from Celtic to my place of work and within the hour after ECU whipped out from under front wheel arch, the remap was done and I was out for a quick test drive.

The increase in power is even more than I could have hoped for - +63bhp and +77lb/ft is suggested and whilst only a session on a rolling road would prove it, I’ve little doubt it’s all there. I’ve noticed from 40mph particularly it is now a hoot and joint a motorway even more effortless than before.

The car has never been a sports car but even more of an effortless performance cruiser than previously. It’s actually made me decide to keep the car for a couple more years. As such a bargain of a thing to have done and if I do get the BMW 640d I’ve promised myself next, the tuning guy said they can do wonders for that too, getting 313bhp to nearer 400bhp.

Can’t comment on mpg gains at this stage as I keep marvelling at the extra grunt I’ve got. Great communication from Celtic and an effortless process.


K Hales

United Kingdom

Not an actual picture of the tuned car

Mercedes Benz Sprinter 218-518 CDi 184 bhp

Check Mercedes Benz Sprinter stats

Posted on 18th September 2019, 11:56

Not an actual picture of the tuned car

I've just had my Mercedes Sprinter Motorhome remapped by Celtic. Because I use the motorhome for towing I wanted an emphasis on extra torque, which Celtic were able to do. They can provide a tune to suit your individual requirements, it is not a "one size fits all" service.

The increase in power was immediately noticeable, a nice linear flow, with no exhaust smoke; unlike a previous tune I had by another Company on a Fiat motorhome.

The real test came on my return trip to Devon. The hills on the A30, crossing Bodmin Moor and the fringes of Dartmoor, were ascended with satisfying ease. And to top it all there was an improvement in fuel consumption.

Good service, friendly staff and a great product = one delighted customer.

Rodney Eyles

United Kingdom

Mercedes Benz E Class E320 CDI 204 bhp Diesel

Posted on 2nd July 2019, 15:40

Lol, where do I start ??? Took a trip to Newquay yesterday for a rolling remap at HQ.

The lady n gents where very very helpful and accommodating and I was extremely well-cared and catered for! The tech guys spent around 3 1/2 hours on my car and between them and myself established that my upgraded injectors were, in fact, wrong and my original injectors would suit better for now and that I need some additional parts but they did manage to tweak my car a bit more to the upgrades I already have and what a difference yet again to the car !! BUT they couldn’t remap my car not the day to what it was planned for and despite the guys spending way more time on my car than scheduled, I was not charged a penny and I really appreciated this along with all the time n effort the whole team put in to make me feel so relaxed after a 5 hour drive from home!

Very very professional, kind n friendly team all round !!! Would very highly recommend Celtic tuning to anyone !!!! 😎👍

Chris hughes

Notts, Uk, United Kingdom

Not an actual picture of the tuned car

E220 stage one remap

Check Mercedes Benz E Class stats

Mercedes Benz E Class E220 CDI BlueEFF 167 bhp Diesel

Posted on 25th June 2019, 13:47

Not an actual picture of the tuned car

I had this remap done a week ago and I can confirm that it has been very positive. It pulls much better in all gears, is very smooth and effortless and really goes when you ask it to.

I am not in a position to comment on the MPG yet, however early indication shows an improvement.

Communication before the appointment was good. The service on the day was spot on, the engineer was friendly and appeared to be very knowledgeable and was on time.


United Kingdom

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