Highly recommend doing your door check straps.

I did the front 2 from the directions under D.I.Y. on my W201.

engatworks' instructions work to the tee!!!

I highly recommend it for anyone look to keep those doors stiff!!!

My car has 152 000kms on it now and I noticed a huge improvement!!!

One piece of advice, when you are hammering out the lock pin on the check strap that attaches to the inner door seal, use cardboard up against the sill and wedge it between the pin and the sill so you can save you paint from getting scratched from the hammer....

Take care guys....

Now to figure out the rattle in the engine bay....

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1989 300CE - 269,000 km
1994 SL600 - 59,000 km