How rust resistant is the underneath of a 98 SLK?

[miurasv]

I have a 98 SLK with 44k miles and Full Mercdes Service History (serviced every year) and wondered how rust resistant they are underneath. Would my car need any re undersealing at this stage in its life? Thanks in advance.

 

[television]

They are quite good underneath.

If it was mine, I would clean out the mud from the wheel arches is it builds up in the inside edge then Waxoil the under side of the car and the wings.

Underseal is out of fashion as water can get underneath it and make the car worse than before

 

[dragon]

Already got sealant and painted. Beware after winter, wash off the salts underneath, the brakes area and the exhaust system.