AST 35mm F&R Lowering Springs Mercedes Benz SL Class W129R (ASTLS 14 1196) (89 01). AST Lowering Springs for the 1989 2001 Mercedes Benz SL Class (W129R) are manufactured from a premium high tensile chromium silicone wire which is handpicked by AST engineers for its quality and metal consistency. Each spring is cold wound and then heat treated to increase hardness and reduce internal stresses present after winding. Each spring is then individually shot peened, phosphate treated and then powder coated to outlast even the life of the vehicle. Features Progressive rates on most vehicles. EDC Compatible (if applicable to vehicle) Each spring is blocked and computer tested prior to shipping, which reduces any settling once installed on the vehicle. Lifetime warranty on breaking. Most of our spring applications are TUV Certified and certificates can be provided upon request. Specifications Part Number ASTLS 14 1196 Product AST Lowering Springs Production Years 01 1989 2001 Model Years 1989 2001 Make Mercedes Benz Model SL Class Chassis W129R Approximate Drop Front 35mm Approximate Drop Rear 35mm TV Certified Yes Model Note Note 1 Vehicle Fitment 1989 Mercedes Benz SL Class 300SL 300SL 24V 500SL 600SL (W129R) 1990 Mercedes Benz SL Class 300SL 300SL 24V 500SL 600SL (W129R) 1991 Mercedes Benz SL Class 300SL 300SL 24V 500SL 600SL (W129R) 1992 Mercedes Benz SL Class 300SL 300SL 24V 500SL 600SL (W129R) 1993 Mercedes Benz SL Class 300SL 300SL 24V 500SL 600SL (W129R) 1994 Mercedes Benz SL Class 300SL 300SL 24V 500SL 600SL (W129R) 1995 Mercedes Benz SL Class 300SL 300SL 24V 500SL 600SL (W129R) 1996 Mercedes Benz SL Class 300SL 300SL 24V 500SL 600SL (W129R) 1997 Mercedes Benz SL Class 300SL 300SL 24V 500SL 600SL (W129R) 1998 Mercedes Benz SL Class 300SL 300SL 24V 500SL 600SL (W129R) 1999 Mercedes Benz SL Class 300SL 300SL 24V 500SL 600SL (W129R) 2000 Mercedes Benz SL Class 300SL 300SL 24V 500SL 600SL (W129R) 2001 Mercedes Benz SL Class 300SL 300SL 24V 500SL 600SL (W129R)