Requires 2 for all vehicles.
Fitment Notes:
1972 Mercedes 350SL thru engine #030108
1973-1975 Mercedes 450SE thru engine #029566
1973-1975 Mercedes 450SEL thru engine #029566
1973-1975 Mercedes 450SL thru engine #030108
1973-1975 Mercedes 450SLC thru engine #030108