I have a hidden glow plug switch. I could hand somebody the key to my (cold) 240D and they still wouldn't be able to start it unless I told them, or they just happened to look in the right place and figure out what the switch is for.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.