DOT 5 Brake Fluid in '82 240D
 

I am getting ready to replace the master brake cylinder on my '82 240D. The recommended fluid is DOT 4 but an autoparts salesperson told me that DOT 5 is available and is better than DOT 4 because it is synthetic.

Is it OK to use DOT 5 in a car this old? Is it compatable with the current seals that are in the brake calipers?

Thanks for any advice.

Herb
'82 240D
'87 300 SDL

The MB dealer here still recommends DOT4 for my benz.

My 0.02$