Its old, it will do that. All the way up to '85 acutally.

I would reccommend a newer Mercedes if you are concerned.

When I was 6 I ran my parents 1981 Mercedes into their fire works stand they owned because it didn't have a shifter lock.

I know first hand, this could be very dangerous and sort of cool too!

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Ryan
1985 300D Turbo Diesel
1984 200 Euro