To put both cars to the test, we devised an hour-long traffic loop through Brisbane’s CBD and Fortitude Valley, on a scorching 41-degree Celsius day with 90 per cent humidity in late January – possibly the hottest day of the year in Brisbane.
Both cars were set to Comfort mode and had their air conditioning blasting. After about 20 minutes, the AMG’s engine temperature was sitting noticeably above normal (3/4), even though it was hardly getting out of second gear, while the Audi appeared to have no such temperature issues.
After a while, the Merc also presented us with tyre pressure errors, as well as a failure in the adaptive headlights.
It’s hard to say if these were temperature related, but the Audi had no such problems. Both these problems went away in the AMG after some time