My most basic point with tires is that: tires make the car. Your decision about tires suits you and I can't say too much against any economic plan. But, whether your car is a MB at $5000 or at $50,000, the tires you put on it have more to do with its drivability than anything else you can do. Safety is a bonus.
Bosch Master, ASE Master, L1
33 years MB technician