1993 Mercedes-Benz SL600 (R129)

The R129 SL600 (1993-2001) used the M120 6.0-litre V12 with 389hp. Ultimate luxury with twelve-cylinder refinement. Extraordinary but complex. Values rising for good examples.

Roof: Hydraulic system complex - pumps, rams, sensors. Must be carefully maintained. Budget £2k+ for full overhaul. Roll-bar mechanism must be tested. Engine: M103/M104 six reliable but head gaskets on 24v. M119 V8 generally bulletproof. M120 V12 complex - wiring harness, ignition, sensors. Transmission: 722.x autos generally robust. Body: Check for rust in sills, floor, inner wings. Suspension: Self-levelling rear standard - check operation. Electrics: Age-related issues. Soft-top: Check fabric and rear window.

V8 or V12 engine, Hard-top, Panoramic roof option, Full leather, Heated seats, Service history with roof maintenance documented