Reigning Formula 1 world champion Mercedes have officially unveiled their 2017 race car, the W08, at a launch event at Silverstone.
Its nose is narrower and features a more rounded end compared to the thumb stub as seen on rivals Williams, Sauber and Renault.
A small shark fin was revealed at the race track, but a larger version of it is expected to be tested later.
“It is so exciting to see this thing come together,” said Hamilton as he and new team-mate Valtteri Bottas revealed the car.
“From working in the windtunnel, then they have this jig which is into real carbon fibre, you see it all come together, do the seat fitting over the winter and in the last few days seeing it all appearing, somehow they all just slot in perfectly.
“Driving today, naturally the car feels wider, which it is, and the front tyres feel huge.
“There is quite a lot of grip already even in the cold conditions here.
“This is not a test, really the laps I did today were behind a vehicle to get filming in and just a shakedown.
“I got to go a little bit faster but it’s so gusty and it is wet.”
Former Williams driver Bottas had a late call to join the team that has dominated the last three Formula 1 seasons after Nico Rosberg retired days after clinching the 2016 championship.
“It is a big day for me,” said Bottas.
“Driving a Silver Arrow for the first time is something very special.
“I have been waiting for this moment for quite a while and also for the test for a long time.
“I am going to drive the car in less than an hour, it feels real and I am amazed how good the car is looking.
“What I really like about this is how clean it looks, but there is a massive amount of detail on the rear end and bargeboards – development has been done – and how far everything has been taken with this car.
Mercedes has dominated the sport since 2014, when the championship switched to a V6 turbo-hybrid engine formula, winning 51 of the 59 Grands Prix.