Tyres.co.uk sells Mercedes SLC tyres with Michelin Pilot Sport 5 and Pirelli P Zero (PZ5) in the staggered fitment of SLC 300; 225/40 ZR18 92Y XL front and 245/35 ZR18 rear. Make sure that you check the required load and speed indexes based on the registration when placing your order.
The Mercedes SLC tyre size information can be found in the tyre pressure table on the fuel-filler flap. Check the table to see the permitted tyre sizes. The tyre and loading information placard is located on the driver side of the B-pillar. Check the information there versus the sidewall of your tyres.
Due to the drivetrain, the Mercedes SLC doesn't need all four tyres replaced at the same time. Each model of the SLC is equipped with rear wheel drive. Mercedes states that each axle should carry the same tyre dimensions and, where possible, the same make and model. Replace tyres as an axle pair. Because the front and rear sizes differ, a new pair goes on the axle it belongs on.