Here is the full list of all 37 Car Mechanic Simulator trophies - there are 23 bronze, 8 silver, 5 gold and 1 platinum.
Sell 25 cars
Visit Racetrack
Unlock 10 levels of parking
Buy 3 cars from one barn
Paint car
Buy car from auction
Visit Test Track
Buy new car in car salon
Reach level 3 of discount
Reach level 3 of garage expansion
Reach level 3 of unscrewing
Unlock all the tools
Unlock tablet
Spend 100 000$ in shop
Spend 10 000$ in shop
Renovate and sell a car
Collect 100 000$
Collect 10 000$
Buy car from junkyard
Earn all trophies
Collect 1 000 000$
Sell 100 cars
Sell 1 000 cars
Fix your first car
Pour old oil on the floor
Finish all the special missions
Fix 100 old cars
Spend 1 000 000$ in shop
Detail interior of car
Drop to 0$
Repaint a car to factory color
Finish order with experience bonus
Finish order with money bonus
Pour too much oil
Finish undone order
Finish lap with time under 1 minute
Fix your first Bolt Hellcat