The 2004 Mercedes-Benz S430 typically requires synthetic engine oil, specifically meeting the Mercedes-Benz specification of 229.5. A common choice is 5W-40 or 0W-40 viscosity oil, which provides optimal performance and protection. Always consult your owner's manual for the most accurate information regarding oil specifications and maintenance recommendations.
I always use Motul 20w/40. It is not synthetic, and change it every 7500 km.
The 2004 Mercedes-Benz SLK-Class has a 6-speed manual.
The 2004 Mercedes-Benz C-Class has a 6-speed manual.
The 2004 Mercedes-Benz G-Class has a 5-speed shiftable automatic.
The 2004 Mercedes-Benz E-Class has a 5-speed shiftable automatic.
The 2004 Mercedes-Benz M-Class has a 5-speed shiftable automatic.
The 2004 Mercedes-Benz CL-Class has a 7-speed shiftable automatic.
The 2004 Mercedes-Benz SL-Class has a 7-speed shiftable automatic.
The 2004 Mercedes-Benz S-Class has a 7-speed shiftable automatic.
The 2004 Mercedes-Benz S-Class runs on premium unleaded (required).
The 2004 Mercedes-Benz C-Class runs on premium unleaded (required).
The 2004 Mercedes-Benz CL-Class runs on premium unleaded (required).