Yes - enter your UK registration in the search tool above to pull up tyre options that match your Mercedes 320, then confirm the tyre size and rating shown on your current tyres before checkout.
You can read the size from the tyre sidewall (for example, 225/55 R16) or check the sticker inside the driver door area or the handbook, then enter those details in the manual size search.
In most cases, yes - match the manufacturer specification for your Mercedes 320, including speed rating and load index, to maintain safe handling and stay road legal.
After you pick tyres for your Mercedes 320, you select a nearby fitting centre and appointment time during checkout; the tyres are delivered to that garage for fitting on the booked date.
The UK legal minimum is 1.6mm across the central three-quarters of the tread around the full circumference, but many drivers replace Mercedes 320 tyres earlier (around 3mm) for better wet grip and braking.