Mercedes-Benz SL-Class, R232 (EU)

Additional Notes

• The Mercedes-Benz SL-Class R232 (EU) SL 43 AMG (232.450) runs three separate coolant circuits: a main cooling system holding 11.2 liters, a low temperature circuit holding 5.3 liters, and a second low temperature circuit holding 2.5 liters, bringing the combined total across all three to 19.0 liters.
• The SL 55 AMG 4MATIC+ (232.480) and SL 63 AMG 4MATIC+ (232.481) share an identical main cooling system capacity of 17.8 liters, which is among the largest single-circuit figures in the R232 lineup.
• The SL 63 AMG S E Performance 4MATIC+ (232.482) carries three distinct coolant circuits: a main cooling system at 14.6 liters, a secondary cooling system at 10.4 liters, and a dedicated electric motor cooling circuit at 5.7 liters, reflecting the thermal management demands of a hybrid powertrain.
• The electric motor cooling circuit on the 232.482 holds 5.7 liters, a capacity that exists independently of the combustion engine circuits and addresses the separate heat rejection requirements of the hybrid drive unit.
• Across all R232 configurations in the specifications, the coolant change interval is uniformly set at 200,000 km or 120 months under normal use conditions, with 120 months equating to a 10-year calendar limit.
• The 200,000 km distance threshold means the interval is governed by whichever limit arrives first, so a vehicle accumulating low annual mileage would still reach the service point at the 10-year mark.
• The SL 43 AMG main circuit capacity of 11.2 liters is notably lower than the 17.8-liter figure of the V8-powered SL 55 AMG and SL 63 AMG variants, a difference consistent with the smaller displacement and cylinder count of the SL 43 AMG engine.
• The secondary cooling circuit on the 232.482 holds 10.4 liters, a volume large enough to suggest a substantial heat exchanger network beyond the primary combustion engine circuit, separate from the electric motor's own 5.7-liter loop.