Mishimoto 180°F Racing Thermostat - Mercedes E55/C55/S55/CLS55/SL55/G55 AMG 2003-2006

Mishimoto racing thermostat for the 2003-2006 Mercedes-Benz AMG M113 5.4L supercharged engine (E55, C55, S55, CLS55, SL55, G55 AMG). It opens at 180°F — lower than the stock 188.6°F — so coolant flows earlier to reduce and maintain cooler engine temperatures on street or track. Direct-fit replacement, backed by the Mishimoto Lifetime Warranty.

Specifications

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy