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For me? Rover was free, the Merc was £800. The Merc then cost me over £4k in repairs and maintenance. The Rover cost me less than £1000.
For the original owner the Rover was something like £12,000 in 1987. The Merc cost the original owner more than £40,000 in 1990. So it had a right to be in a different league quality-wise.
I enjoyed owning both, but thinking about it now, I'd rather have another SD1 than another W124.I got the OBD thing to talk to my laptop. I was right, the fuckers sent me a bluetooth one instead of the wifi one I ordered.
Anyway 2 codes relating to the left and right post-cat oxygen sensors. As the idea of them both failing at the same time is bullshit I have cleared the codes and I'll see if they return. I've read that there is a technical service bulletin relating to the engine management software having a bug that causes these codes, and it might need a software update.
SD1s fucking rock. The handling on them was great, despite the live axle, and they looked fabulous. As for build quality late ones are better made than early ones but Lucas electrical connectors let them down. My 1986 2300 was a fuckton more reliable than my 1990 Mercedes, though for perceived quality like switches and materials and nice little design touches the Mercedes wiped the floor with it