This CSF High-Performance All-Aluminum Auxiliary Radiator is built for the Mercedes-AMG M157 V8 in the E63 and CLS 63. The manufacturer specifies 100% all-aluminum TIG-welded construction, and each unit is individually leak and pressure tested. The auxiliary radiators also act as the heat-exchange medium for the charge-air cooling system, so a larger, better-built unit helps keep engine coolant and intake air temperatures in range once heat builds up on track days or long pulls. The factory auxiliary radiators offer little protection from road debris, so this unit's detachable rock guard guards against debris buildup and core punctures, which is a practical reason to pay more than stock.
The CNC-machined mounting brackets and OEM-style quick-connect inlet and outlet fittings are meant to make this a direct replacement rather than a modification. The part is multi-fit and fits either the left or right side, so it is sold individually. The manufacturer recommends replacing both left and right OEM units on vehicles equipped with two. Enthusiasts searching for an M157 E63 auxiliary radiator upgrade, CLS 63 AMG aux cooling, aluminum aux radiator with rock guard, or heat soak reduction will find this part relevant. The 1-hour mirror-finish hand polish is a cosmetic detail that suits engine bays where the cooling components are visible.
The manufacturer recommends purchasing two units to replace both the left and right OEM auxiliary radiators on vehicles that came with a pair from the factory.
Yes. The manufacturer describes this radiator as multi-fit, so it fits both the left and right positions, but it is sold individually.
Yes. The manufacturer includes a rock guard that is detachable from the radiator.
