There seem to be only two major issues with these cars:

(1) the boot (trunk) and the roof are prone to leaking, especially the former;
(2) the SBC brakes were the subject of a recall and need a software reset or update or something from time to time.

Cars with a high spec, especially those with the "Keyless Go" option can exhibit electrical gremlins.

Otherwise, they seem to be great.

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JJ Rodger
2013 G350 Bluetec
1999 SL 500
1993 E300 diesel T
1990 190