Facts and figures
| Mercedes C180 AMG | Audi A5 1.8 TFSI S line | |
| On-the-road price/total as tested | £32,590/£42,670 | £30,565/£32,470 |
| Residual value (after 3yrs/30,000) | £14,796/45.4% | £15,374/50.3% |
| Depreciation | £17,794 | £15,191 |
| Annual tax liability std/higher rate | £1,296/£2,592 | £1,033/£2,067 |
| Annual fuel cost (12,000/20,000 miles) | £2,097/£3,495 | £2,040/£3,400 |
| Ins. group/quote/road tax band/cost | 32/£444/F/£135 | 27/£353/E/£120 |
| Servicing cost | £972 (3yrs) | £1,440 (3yrs) |
| Length/wheelbase | 4,633/2,760mm | 4,626/2,751mm |
| Height/width | 1,391/1,770mm | 1,372/1,854mm |
| Engine | 4cyl in-line/1,595cc | 4cyl in-line/1,798cc |
| Peak power | 152/5,000 bhp/rpm | 168/3,800 bhp/rpm |
| Peak torque | 250/1,250 Nm/rpm | 320/1,400 Nm/rpm |
| Transmission | 7-spd auto/rwd | 6-spd man/fwd |
| Fuel tank capacity/spare wheel | 66 litres/space saver | 63 litres/space saver |
| Boot capacity (seats up/down) | 450litres/N/A | 455/829 litres |
| Kerbweight/payload/towing weight | 1,505/470/1,800kg | 1,425/500/1,500kg |
| Turning circle/drag coefficient | 10.8metres/0.27Cd | 11.4 metres/0.30Cd |
| Basic warranty (miles)/recovery | 3yrs (unltd)/4yrs | 3yrs (60,000)/3yrs |
| Service intervals/UK dealers | Variable/136 | Variable/121 |
| Driver Power manufacturer/dealer pos. | 8th/10th | 15th/18th |
| Euro NCAP: Adult/child/ped./stars | 90/79/57/5 stars | N/A |
| 0-60/30-70mph | 9.1/9.0 secs | 8.0/7.8 secs |
| 30-50mph in 3rd/4th | 4.2/5.8 secs | 4.0/5.9 secs |
| 50-70mph in 5th/6th | 9.8/11.8/13.6 secs | 7.4/9.4 secs |
| Top speed/rpm at 70mph | 139mph/2,000rpm | 143mph/2,000rpm |
| Braking 70-0/60-0/30-0mph | 46.1/33.8/8.6m | 46.8/34.3/8.4m |
| Noise levels outside/idle/30/70mph | 63/43/58/67dB | 60/43/60/69dB |
| Auto Express econ (mpg/mpl)/range | 35.9/7.9/521 miles | 36.9/8.1/511 miles |
| Govt urban/extra-urban/combined | 35.3/53.3/44.8mpg | 38.2/58.9/49.6mpg |
| Govt urban/extra-urban/combined | 7.7/11.7/9.9mpl | 8.4/13.0/10.9mpl |
| Actual/claimed CO2/tax bracket | 182/147g/km/20% | 177/134g/km/17% |
| Airbags/Isofix/rear parking sensors | Seven/yes/yes | Six/yes/yes |
| Automatic box/stability/cruise ctrl | Yes/yes/yes | £1,480/yes/£225 |
| Climate ctrl/leather/heated seats | Yes/£1,720/£330 | Yes/yes/£280 |
| Met paint/xenon lights/keyless go | £645/yes/£930 | £615/yes/£505 |
| Sat-nav/USB connection/Bluetooth | £495/yes/yes | £1,620/£255/yes |
