A45 tuning
litchfield logo
litchfield logo

Mercedes A45, CLA45, GLA45 AMG Tuning


The Mercedes-AMG A45 has received a number of very positive reviews since its release, but one of the few criticisms seems to be that it lacks some of the ‘fun’ of its rivals. We can change that.


We offer a range of proven performance upgrades that will transform the power delivery and thrill of driving your A45, CLA45 and GLA45. Although available separately, we combined the most popular options into our simple Stage upgrade path. From our popular Stage 1 plug and play box to producing the UK's fastest A45 with Stage 3 we have the all the options covered.

Stage 1 - 400 bhp



Stage 1 is simple upgrade consisting of our successful tuning box. This lifts power and torque considerably. Our tuning box simply installs with its plug and play connectors, meaning that it can be reverted back to standard just as quickly.


Expect a power increase from the standard 360 bhp to 400-410 bhp and torque increases to 400-410 lbft.


Our programmable box means we have the option to further refine the calibration on our Maha dyno (the same one used by Mercedes).


Compatible on both the original and late A45 models, GLA45 and CLA45.

A45 Powergraph

Stage 1

£500.00 ex VAT


Stage 2 - 415 bhp



Our Stage 2 upgrade consists of our tuning box and a large bore intake pipe. This removes the restriction in the standard air box and replaces it with a large intake cone and high flow filter. Price includes the tuning box, intake kit and installation (around 1 hour).


Power increases to 410-420 bhp with 410-415 lbft torque.


Compatible on both the original and late A45 models, GLA45 and CLA45.

A45 Powergraph

Stage 2

£760.00 ex VAT


Stage 3 - 435 bhp



For the Stage 3 upgrade we fit a significantly larger stainless steel downpipe with a link pipe. This removes the catalytic convertor so we would only recommended this for track use. Removing the restriction of the catalytic convertor allows the turbo to spool more quickly and produce more top end power.


This upgrade also requires the original ECU to be fully re-calibrated to provide the very best tune and to safely use the increased flow the new exhaust provides. The price includes 3 hours for fitment. Stage 3 can also be fitted to the CLA45.


Power increases to 435-445 bhp with 430-440 lbft

A45 Powergraph

Stage 3

£2,380.00 ex VAT


A45 AMG dyno 1
A45 AMG downpipe
A45 AMG dyno 1
AMG A45