Facts and figures
| Mercedes E-Class Cabriolet | Audi A5 Cabriolet | |
| On the road price/total as tested | £44,100/£49,202 | £45,065/£49,815 |
| Residual value (after 3yrs/36,000) | £20,701/46.9% | £20,847/46.3% |
| Depreciation | £23,399 | £24,218 |
| Annual tax liability std/higher rate | £1,849/£3,700 | £2,242/£4,484 |
| Annual fuel cost (12k/20k miles) | £1,533/£2,555 | £1,651/£2,752 |
| Ins. group/quote/road tax band/cost | 45/£547/D/£105 | 39E/£461/G/£175 |
| Cost of 1st/2nd/3rd service | £221/£299/£221 | £159/£309/£159 |
| Length/wheelbase | 4,703/2,760mm | 4,626/2,751mm |
| Height/width | 1,398/1,786mm | 1,383/1,854mm |
| Engine | 4cyl in-line/2,143cc | V6/2,967cc |
| Peak power/revs | 201/3,800 bhp/rpm | 242/4,000 bhp/rpm |
| Peak torque/revs | 500/1,600 Nm/rpm | 500/1,400 Nm/rpm |
| Transmission | 7-spd auto/rwd | 7-spd auto/4wd |
| Fuel tank capacity/spare wheel | 66 litres/sp saver | 61 litres/sp saver |
| Boot capacity (seats up/down) | 390 litres/N/A | 380/750 litres |
| Kerbweight/payload | 1,845/470kg | 1,845/500kg |
| Turning circle/drag coefficient | 11.2 metres/0.28Cd | 11.4 metres/0.31Cd |
| Basic warranty (miles)/recovery | 3yrs (unltd)/4yrs | 3yrs (60,000)/3yrs |
| Service intervals/UK dealers | 15,500 (1yr)/136 | Variable/136 |
| Driver Power manufacturer/dealer pos. | 5th/12th | 10th/23rd |
| Euro NCAP: Adult/child/ped./stars | N/A | N/A |
| 0-60/30-70mph | 7.8/8.1 secs | 6.3/6.1 secs |
| 30-50mph in kickdown | 3.3 secs | 2.4 secs |
| 50-70mph in kickdown | 4.8 secs | 3.7 secs |
| Top speed/rpm at 70mph | 151mph/1,600rpm | 155mph/1,850rpm |
| Braking 70-0/60-0/30-0mph | 47.8/35.4/8.6m | 48.6/36.3/9.9m |
| Noise: roof up 30/70/down 30/70 | 65/70/66/75dB | 66/72/67/85dB |
| Auto Express econ (mpg/mpl)/range | 31.6/7.0/730 miles | 35.0/7.7/627 miles |
| Govt urban/extra-urban/combined | 47.9/64.2/57.7mpg | 40.4/54.3/47.9mpg |
| Govt urban/extra-urban/combined | 10.6/14.3/12.8mpl | 9.0/12.1/10.6mpl |
| Actual/claimed CO2/tax bracket | 150/130g/km/21% | 162/154g/km/25% |
| Airbags/Isofix/rear parking sensors | Nine/yes/yes | Four/yes/yes |
| Automatic box/stability/cruise control | Yes/yes/yes | Yes/yes/yes |
| Climate control/leather/heated seats | Yes/yes/yes | Yes/yes/yes |
| Metallic paint/xenon lights/keyless go | £645/no*/£930 | £615/yes/£470 |
| Sat-nav/USB connection/Bluetooth | £1,115/yes/yes | Yes/yes/yes |
